Adjustment of the Thrust Reverser [PW11]

TASK 78-30-00-820-803-A
Adjustment of the Thrust Reverser

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE AFTER SHUTDOWN. THE ENGINE CAN STAY HOT FOR A LONG TIME. IF YOU DO NOT OBEY THIS INSTRUCTION, INJURY CAN OCCUR.

WARNING: WEAR APPLICABLE PERSONAL PROTECTIVE EQUIPMENT (PPE) WHEN YOU DO THIS TASK. BEFORE YOU USE PPE, READ, UNDERSTAND AND OBEY ALL INSTRUCTIONS FOR ITS USE. THESE INSTRUCTIONS INCLUDE INSTRUCTIONS FROM THE MANUFACTURER, YOUR EMPLOYER AND GOVERNMENT REGULATIONS. YOU CAN GET INJURED IF YOU DO NOT USE PPE. GET INSTRUCTIONS FROM YOUR EMPLOYER ON WHICH PPE IS NECESSARY.

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

ZONE: 400

1. Reason for the Job
There are three procedures in this adjustment procedure that give information about the adjustment of the thrust reverser:

Check procedure,
Full adjustment procedure,
Troubleshooting procedure.

For the general summary of procedures, refer to Figure 78-30-00-991-95500.

1. Check procedure:

Use the check procedure to examine the adjustment conditions and make sure that they are in tolerance. Also, the check procedure gives instructions on what to do if you find out-of-tolerance conditions. Do the check procedure first if you have one or more of the conditions that follow:
- Installation of the left and right thrust reverser doors that were adjusted together before you installed them.
- Replacement of only the left or right thrust reverser door.
- Replacement of the engine.
- You did more than one troubleshooting procedure.
- You find out-of-tolerance values at one or more of the following locations:

Aft core cowl splitline,
Six o'clock splitline,
V-blade,
Gap at rivet 7 (R7) lower bifurcation Leading Edge (LE),
Inner Fixed Structure (IFS) upper bifurcation LE locations.

The general description of the check procedure is as follows. Refer to Para. 4.A.
1 Do a check of the IFS bumpers for interference.
2 Bed-in the seals and V-blade.
3 Do a check of the latch handle closing force.
4 Do a check of the latch striker pads for contact.
5 Do a check of the V-blade gap.
6 Do a check of the gap at the R7 lower bifurcation LE.
7 Do a check of the IFS bumper gaps.
8 Do a check of the Nacelle Anti-Icing (NAI) bumper gaps.

2. Full adjustment procedure:

Use the full adjustment procedure to fully adjust the left and right thrust reverser doors. Do the full adjustment procedure if you have one or more of the following conditions:

Installation of the left or right thrust reverser door that were not adjusted together before you installed them.
If told to by the check procedure or troubleshooting procedures.

The general description of the check procedure is as follows. Refer to Para. 4.B.
1 Remove the latch striker pads and shims.
2 Do a check of the IFS bumpers for interference.
3 Bed-in the seals and V-blade.
4 Set the splitline gaps and adjust the latches.
5 Adjust the IFS bumper gaps.
6 Adjust the NAI bumpers.

3. Troubleshooting procedures:

Use the troubleshooting procedures to correct out-of-tolerance conditions. The troubleshooting procedures are applicable only to the thrust reverser doors that were adjusted together before.

Do each of the troubleshooting procedures independently. If you do more than one troubleshooting procedure, do the full check procedure after you complete all the troubleshooting procedures. If you complete the full check procedure and find more out-of-tolerance conditions, it is permitted to do the troubleshooting procedures for the applicable condition.

NOTE: If you find many out-of-tolerance conditions when you do the check procedure, it can be better to do the full adjustment procedure.

The conditions for the troubleshooting procedures are as follows. Refer to Para. 4.C.
- Troubleshooting procedure for latches:

No contact at the L1 lower striker pads.
No contact at the L2 striker pads.
No contact at the L3 striker pads.
No contact at the L4 striker pads.
L4 latch handle closing force is too high.
No contact at the L5 striker pads.
L5 latch handle closing force is too high.

- Troubleshooting procedure for V-blade gap.
- Troubleshooting procedure for the gap at the R7 lower bifurcation LE.
- Troubleshooting procedure for IFS bumper gap.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific	1	GAGE - FEELER
No specific	1	GAGE - PUSH-PULL
No specific	1	WRENCH - HEXAGONAL
No specific	1	WRENCH 1/8 IN - HEXAGONAL
No specific	Torque wrench: range to between 20 and 18 lbf.in (0.226 and 0.203 m.daN )
No specific	Torque wrench: range to between 27 and 24.3 lbf.in (0.31 and 0.27 m.daN )
No specific	Torque wrench: range to between 90 and 81 lbf.in (1.02 and 0.92 m.daN )
No specific	Torque wrench: range to between 105 and 95 lbf.in (1.19 and 1.07 m.daN )
No specific	Torque wrench: range to between 130 and 117 lbf.in (1.47 and 1.32 m.daN )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.PU1-0009)	modelling clay
(Material No.PU1-0087)	leak detection compound
(Material No.PU11-001)	solution cleaning
(Material No.PU4-0010)	base primer
(Material No.PU4-0011)	activator
(Material No.PU4-0012)	thinner
(Material No.PU5-0004)	release agent
(Material No.PU5-0005)	anti-seize compound

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
400	POWER PLANT, NACELLES AND PYLONS
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL, 438AR, 451AL, 452AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR, 461AL, 462AR

D. Referenced Information

REFERENCE	DESIGNATION
TASK 71-00-00-860-833-A	Procedure to Prevent Engine Motoring
TASK 71-13-00-010-802-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-802-A	Closing of the Fan Cowl Doors
TASK 78-30-00-040-805-A	Deactivation of the Thrust Reverser System for Ground Maintenance
TASK 78-30-00-440-805-A	Reactivation of the Thrust Reverser System after Ground Maintenance
TASK 78-32-71-000-802-A	Removal of the Right Thrust Reverser Thermal Insulation Blankets
TASK 78-32-71-400-802-A	Installation of the Right Thrust Reverser Thermal Insulation Blankets
TASK 78-36-00-010-802-A	Opening of the Thrust Reverser Cowl-Doors
TASK 78-36-00-410-802-A	Closing of the Thrust Reverser Cowl-Doors
Thrust Reverser Adjustment - IFS Upper Bifurcation and R7 Lower Bifurcation Leading Edge Gaps
Thrust Reverser Adjustment - Bumper and Striker Pad Locations
Thrust Reverser Adjustment - Removal and Installation of IFS Bumper Pads, NAI Bumpers, and Striker Pads
Thrust Reverser Adjustment - 6 O'clock and Core Cowl Splitline Gaps
Thrust Reverser Adjustment - V-Blade Gap
Thrust Reverser Adjustment - Latch Adjustment
Thrust Reverser Adjustment - Modelling Clay and Release Agent Locations for NAI Bumper Plate
Thrust Reverser Adjustment - Bumper Pad Measurement
Thrust Reverser Adjustment - L4 Striker Pad Permitted Gap
Thrust Reverser Adjustment - IFS Upper Bumper Pad Gap
Thrust Reverser Adjustment - IFS Lower Bumper Pad Gap
Thrust Reverser Adjustment - BLS Latch Clay Check
Thrust Reverser Adjustment - Process Flow Flowchart
Interface Gaps
No. 1 Upper Bumper Gap
No. 1 Lower Bumper Gap
BLS Gap

3. Job Set-up
Subtask 78-30-00-941-105-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) Do the procedure to prevent engine motoring
(Ref. AMM TASK 71-00-00-860-833).

Subtask 78-30-00-010-107-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
1 437AL, 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
1 447AL, 448AR
(2) Put an ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position.

Subtask 78-30-00-040-088-A ** ON A/C NOT FOR ALL

C. Deactivation of the Thrust Reverser for Ground Maintenance

WARNING: YOU MUST DEACTIVATE THE THRUST REVERSER BEFORE YOU DO WORK ON OR AROUND IT. IF YOU DO NOT, THE THRUST REVERSER CAN OPERATE ACCIDENTALLY AND CAUSE AN INJURY AND/OR DAMAGE.

(1) Do the deactivation of the thrust reverser system for ground maintenance (Ref. AMM TASK 78-30-00-040-805).

4. Procedure

CAUTION: WIPE CLEAN ALL PARTS AND TOOLS AS NECESSARY TO REMOVE UNWANTED DEBRIS AND PREVENT DAMAGE TO THE ENGINE.

Subtask 78-30-00-710-077-A ** ON A/C NOT FOR ALL

A. Check Procedure:
(1) Make sure that the thrust reverser doors are open. Refer to Para. 4.D.
(2) Remove the NAI bumpers and shims from the left and right thrust reverser doors. Refer to Step 4.J.(3).
(3) Do a check of the IFS bumpers for interference. Refer to Step 4.B.(1)(d) with the changes as follows:
(a) When you open and close the thrust reverser doors for this check, refer to Para. 4.D. and engage all the latches.
1 Open the latches in the sequence that follows:

L5 latch,
L4 latch,
L3 latch,
Bifurcation Latch System (BLS) latch,
L2 latch,
L1B latch,
L1A latch.

2 Close the latches in the sequence that follows:

L1A latch,
L1B latch,
L2 latch,
BLS latch,
L3 latch,
L4 latch,
L5 latch.

(b) Make sure that there is no interference between the upper bumpers and the pylon bumper pads.
(c) Make sure that there is no interference between the No. 1 lower bumpers on the left and right thrust reverser doors.
(d) Make sure that there is no interference between the BLS receiver cone and the BLS latch pin.
(4) Bed-in the thrust reverser seals and V-blade. Refer to Step 4.B.(1)(e).
(5) Do a check of the latch closing force and the gaps between the related striker pads.
(a) Make sure that you close all the latches.
(b) Make sure that the closing force of the latches are correct and the applicable striker pads touch. Refer to Step 4.B.(2)(h) with the changes as shown:
1 When you open and close the thrust reverser doors for this check, refer to Para. 4.D. and engage all the latches.
2 Open the latches in the sequence that follows:

L5 latch,
L4 latch,
L3 latch,
BLS latch,
L2 latch,
L1B latch,
L1A latch.

3 Close the latches in the sequence that follows :

L1A latch,
L1B latch,
L2 latch,
BLS latch,
L3 latch,
L4 latch,
L5 latch.

(c)

Interface Gaps ** ON A/C NOT FOR ALL

(d) If the closing force of the latches is not correct or there is a gap between the related striker pads, do the applicable troubleshooting procedure for the latches. Refer to Step 4.C.(2).
(6) Do a check of the gap between the V-blade and engine V-groove.
(a) Make sure that the gap between the V-blade and engine V-groove is correct. Refer to Step 4.B.(2)(b)1_a_.
(b) If the gap between the V-blade and engine V-groove is not correct, do the troubleshooting procedure for the V-blade gap. Refer to Step 4.C.(3).
(7) Do a check of the gap at the R7 lower bifurcation LE.
(a)

Interface Gaps ** ON A/C NOT FOR ALL

(b) If the gap at the R7 lower bifurcation LE is not correct, do the full adjustment procedure. Refer to Para. 4.B.
1 You can apply the solution cleaning (Material No.PU11-001) or leak detection compound (Material No.PU1-0087) , to the intermediate case seal area while you do the check for the gap at the R7 lower bifurcation LE.
(8) Do a check of the IFS bumper gaps.
(a) When you open and close the thrust reverser doors for this check, refer to Para. 4.D. and engage all the latches.
1 Open the latches in the sequence that follows:

L5 latch,
L4 latch,
L3 latch,
BLS latch,
L2 latch,
L1B latch,
L1A latch.

2 Close the latches in the sequence that follows:

L1A latch,
L1B latch,
L2 latch,
BLS latch,
L3 latch,
L4 latch,
L5 latch.

(b) Measure and record the IFS upper bifurcation LE gap step. Refer to Step 4.B.(3)(a).
(c) Measure and record the gap at the R7 lower bifurcation LE. Refer to Step 4.B.(3)(b) with the changes as shown in Step 4.A.(8)(a).
(d) Measure and record the IFS bumper gaps. Refer to Step 4.B.(3)(c) with the changes as shown in Step 4.A.(8)(a).
(e) Do a check of the No. 1 upper bumper gap.
1

No. 1 Upper Bumper Gap ** ON A/C NOT FOR ALL

a Find the gaps for the No. 1 upper bumpers on the left and right thrust reverser doors one at a time.
2 Make sure that the No.1 upper bumper gaps on the left and right thrust reverser doors are in tolerance of the values you find in Step 4.A.(8)(e)1_.
(f) Do a check of the No. 2 upper bumper gaps.
1 Make sure that the gaps you measured for the No. 2 upper bumpers on the left and right thrust reverser doors in Step 4.A.(8)(d) are between 0.018 in. (0.46 mm) and 0.123 in. (3.12 mm).
a Do the check for the No. 2 upper bumpers on the left and right thrust reverser doors one at a time.
(g) Do a check of the No. 1 lower bumper and BLS gaps.
1

No. 1 Lower Bumper Gap ** ON A/C NOT FOR ALL

2 Make sure that the No. 1 lower bumper gap is in tolerance of the gap you find in Step 4.A.(8)(g)1_.
3

BLS Gap ** ON A/C NOT FOR ALL

4 Make sure that the BLS gap is in tolerance of the gap you find in Step 4.A.(8)(g)3_.
(h) If the gaps for the No. 1 upper bumper, No. 2 upper bumper, No. 1 lower bumper, or the BLS is out of tolerance, adjust them. Refer to Step 4.B.(3).
(9) Do a check of the NAI bumper gap as follows:
(a) Make sure that the NAI bumpers and shims are removed. Refer to Step 4.J.(3).
(b) Do a check of the NAI bumpers and if necessary, adjust them. Refer to Step 4.B.(4).
(c) Install the NAI bumpers and shims. Refer to Step 4.J.(3).

Subtask 78-30-00-820-073-A ** ON A/C NOT FOR ALL

B. Full Adjustment Procedure
Use the full adjustment procedure to fully adjust the left and right thrust reverser doors. Do the full adjustment procedure if you have one or more of the following conditions:

Installation of the left or right thrust reverser door that are not adjusted together before.
If told to by the check procedure or troubleshooting procedures.

(1) Prepare for latch adjustment.
(a) Open the thrust reverser doors. Refer to Para. 4.D.
(b) Remove the striker pads, IFS bumper pads, NAI bumpers, shims and washers from the left and right thrust reverser doors. Refer to Para. 4.J.
(c) Retract the BLS bumper and loosen the latches as follows:
1

Thrust Reverser Adjustment - Latch Adjustment ** ON A/C NOT FOR ALL

(d) Do a check of the IFS bumpers for interference as follows:

NOTE: This procedure uses the modelling clay (Material No.PU1-0009) to measure gaps. Alternative methods that are sufficiently accurate are permitted.

1 Apply the modelling clay (Material No.PU1-0009) on the No. 1 upper bumper and No. 2 upper bumper locations on the left and right thrust reverser doors.
2 Apply the modelling clay (Material No.PU1-0009) on the No. 1 lower bumper locations on the left and right thrust reverser doors.
3

Thrust Reverser Adjustment - BLS Latch Clay Check ** ON A/C NOT FOR ALL

4 Close the thrust reverser doors and engage the latches in the order that follows. Refer to Para. 4.D.
a Engage and close the L1B latch, then the L4 latch.
5 Open the L4 latch, then the L1B latch and open the thrust reverser doors. Refer to Para. 4.D.
6 Make sure that the thickness of the clay on the No. 1 upper bumper and No. 2 upper bumper locations are a minimum of 0.040 in. (1.016 mm).
a Make sure that there is no interference between the upper bumpers and the pylon bumper pads.
b If the thickness is less than 0.040 in. (1.016 mm), adjust the number of washers on the applicable bumper. Refer to Step 4.J.(1).
7 Make sure that the thickness of the clay on the No. 1 lower bumper locations is a minimum of 0.125 in. (3.175 mm).
a Make sure that there is no interference between the No. 1 lower bumpers on the left and right thrust reverser doors.
b If the thickness is less than 0.125 in. (3.175 mm), adjust the number of washers on the applicable bumper. Refer to 4.J.(1).
8 Make sure that the thickness of the clay on the BLS receiver cone is a minimum of 0.125 in. (3.175 mm).
a

Thrust Reverser Adjustment - BLS Latch Clay Check ** ON A/C NOT FOR ALL

b If the thickness is less than 0.125 in. (3.175 mm), adjust the star wheel on the BLS pin.
9 Remove the clay from the No. 1 upper bumpers, No. 2 upper bumpers, No. 1 lower bumpers and BLS receiver cone.

CAUTION: WHEN YOU CLOSE THE THRUST REVERSER DOOR, MAKE SURE THAT THE ALIGNMENT FITTING AND V-BLADE CORRECTLY ENGAGE INTO THE FAN CASE V-GROOVE. IF THEY DO NOT CORRECTLY ENGAGE INTO THE FAN CASE V-GROOVE, DAMAGE TO THE COMPONENTS CAN OCCUR.

CAUTION: MAKE SURE THAT THE SHEAR PINS AT THE LATCH LOCATIONS CORRECTLY ENGAGE IN THE PIN RECEPTACLES AT THE KEEPER LOCATIONS. IF THEY DO NOT CORRECTLY ENGAGE, DAMAGE TO THE SHEAR PINS CAN OCCUR.

CAUTION: MAKE SURE THAT THERE IS NO INTERFERENCE BETWEEN THE THRUST REVERSER DOORS AND THE PYLON, ENGINE, OR OTHER COMPONENTS WHEN YOU CLOSE THE THRUST REVERSER DOORS. IF YOU CLOSE THE THRUST REVERSER DOORS AND THERE IS INTERFERENCE, DAMAGE TO THE COMPONENTS CAN OCCUR.

(e) Bed-in the thrust reverser seals and V-blade as follows:
1 Close the thrust reverser doors, but do not engage the closure assist assembly or the latches. Refer to Para. 4.D.
2 Open the thrust reverser doors until the V-blade is fully disengaged. Refer to Para. 4.D.
3 Do Step 4.B.(1)(e)1_ and Step 4.B.(1)(e)2_ again five more times.
(2) Set the splitline gaps and adjust the latches.
(a) Set the six o'clock splitline gap as follows:

NOTE: For instructions to measure the latch closing force, refer to Para. 4.F.

CAUTION: DO NOT CLOSE THE L1A, L1B OR L4 LATCH WITH A FORCE OF MORE THAN 80 LBF (36.28 KGF). IF YOU DO, YOU CAN CAUSE DAMAGE TO THE LATCH.

CAUTION: WHEN THE SHIMS ARE INSTALLED, DO NOT CLOSE THE L1A, L1B OR L4 LATCH WITH A FORCE OF MORE THAN 36 LBF (16.32 KGF). YOU CAN USE A MAXIMUM CLOSING FORCE OF 80 LBF (36.28 KGF) ONLY WHEN YOU REMOVE ALL THE RELATED SHIMS. IF YOU DO NOT OBEY THESE INSTRUCTIONS, YOU CAN CAUSE DAMAGE TO THE LATCHES.

1 Close the L1B latch.
a Make sure that the force necessary to close the L1B latch is not more than 80 lbf (35.59 daN).
b If you cannot close the L1B latch with a force of 80 lbf (35.59 daN) or less, close the L1A and L1B latches together.
2

Thrust Reverser Adjustment - Removal and Installation of IFS Bumper Pads, NAI Bumpers, and Striker Pads ** ON A/C NOT FOR ALL

3 Close the L4 latch.
a Make sure that the force necessary to close the L4 latch is not more than 50 lbf (22.24 daN).
b If you cannot close the L4 latch with a force of 50 lbf (22.24 daN) or less, close the L2 and L3 latches before you close the L4 latch.
c Open the L2 and L3 latches when the L4 latch is closed.
4

Thrust Reverser Adjustment - Removal and Installation of IFS Bumper Pads, NAI Bumpers, and Striker Pads ** ON A/C NOT FOR ALL

(b) Do a check and adjust the V-blade and R7 lower bifurcation LE gaps.

CAUTION: IF THE GAP BETWEEN THE V-BLADE AND ENGINE V-GROOVE IS ZERO, DO NOT DECREASE THE 6 O’CLOCK SPLITLINE GAP MORE. IF YOU DO, PRELOAD TO THE STRUCTURE CAN OCCUR AND CAUSE INCORRECT TOLERANCES AT THE LOWER BIFURCATION LEADING EDGE.

1 Do a check and adjust the V-blade gap as follows:
a Measure the gap between the V-blade and the engine V-groove with the GAGE - FEELER or equivalent.

Thrust Reverser Adjustment - 6 O'clock and Core Cowl Splitline Gaps ** ON A/C NOT FOR ALL

b If the V-blade gap is larger than 0.030 in. (0.762 mm), decrease the six o'clock splitline gap. Refer to Para. 4.E.

Do this again until the V-blade gap is within tolerance.

2 Do a check and adjust the gap at the R7 lower bifurcation LE as follows:
a Make sure that the L1B and L4 latches are closed.

Make sure that all the remaining latches are open.

CAUTION: DO NOT CLOSE THE L5 LATCH WITH A FORCE OF MORE THAN 50 LBF (22.68 KGF). IF YOU CLOSE THE L5 LATCH WITH A FORCE OF MORE THAN 50 LBF (22.68 KGF), YOU CAN CAUSE DAMAGE TO THE LATCH.

CAUTION: WHEN THE SHIMS ARE INSTALLED, DO NOT CLOSE THE L5 LATCH WITH A FORCE OF MORE THAN 36 LBF (16.32 KGF). YOU CAN USE A MAXIMUM CLOSING FORCE OF 50 LBF (22.68 KGF) ONLY WHEN YOU REMOVE ALL THE RELATED SHIMS. IF YOU DO NOT OBEY THESE INSTRUCTIONS, YOU CAN CAUSE DAMAGE TO THE LATCHES.

b Close the L5 latch.

Make sure that the force necessary to close the L5 latch is not more than 50 lbf (22.24 daN).

Thrust Reverser Adjustment - 6 O'clock and Core Cowl Splitline Gaps ** ON A/C NOT FOR ALL

Interface Gaps ** ON A/C NOT FOR ALL

d Measure the gap at the R7 lower bifurcation LE.

Thrust Reverser Adjustment - IFS Upper Bifurcation and R7 Lower Bifurcation Leading Edge Gaps ** ON A/C NOT FOR ALL
Interface Gaps ** ON A/C NOT FOR ALL

e If the gap at the R7 lower bifurcation LE is out-of-tolerance, adjust the six o'clock splitline gap until the gap at the R7 lower bifurcation LE is within tolerance. Refer to Para. 4.E.

NOTE: You can apply the solution cleaning (Material No.PU11-001) or leak detection compound (Material No.PU1-0087) to the intermediate case seal area while you adjust the gap at the R7 lower bifurcation LE.

(c) Adjust the L1 and L4 latches as follows:
1 Apply the modelling clay (Material No.PU1-0009) to where you will install the striker pads at the forward L1 and aft L1 striker pad locations.

NOTE: It is not necessary to apply clay at the upper L1 striker pad location.

2 Apply the modelling clay (Material No.PU1-0009) to where you will install the striker pads at the L4 striker pad location.
a Apply the clay between the fastener holes.
3 Close the thrust reverser. Refer to Para. 4.D. with the changes as follows:
a Close the latches in the sequence that follows:

L1B latch,
L4 latch,
L5 latch.

4 Open the thrust reverser. Refer to Para. 4.D. with the changes as follows:
a Open the latches in the sequence that follows:

L5 latch,
L4 latch,
L1B latch.

5 Measure and record the thickness of the clay at the forward L1, aft L1, and L4 striker pad locations.

NOTE: If you used tape between the clay and the structure, add the thickness of the tape to the thickness of the clay.

6 Collect the number of shims and striker pads equal to the thickness of the clay you measured on Step 4.B.(2)(c)5_.

NOTE: If the thickness of the shims does not equal the thickness of the clay, round the number of shims up to the next full shim.

7 Divide the shims you collected in Step 4.B.(2)(c)6_ equally between the left and right thrust reverser doors.

NOTE: If there is an odd number of shims, put the odd shim on the left thrust reverser door.

8 Install the striker pads and shims on the left and right thrust reverser doors at the forward L1 and aft L1 striker pad locations. Refer to Step 4.J.(2).

CAUTION: MAKE SURE THAT YOU INSTALL THE SAME NUMBER OF SHIMS AT THE UPPER L1 STRIKER PAD LOCATION AS AT THE AFT L1 STRIKER PAD LOCATION. IF YOU DO NOT DO THIS, THE THRUST REVERSER CAN OPERATE INCORRECTLY DURING FLIGHT.

9 Install the striker pads and shims on the left and right thrust reverser doors at the upper L1 striker pad location.
a Use the same number of shims you installed on the aft L1 striker pad location for the upper L1 striker pad location. Refer to Para. 4.J.
10 Install the striker pads and shims on the left and right thrust reverser doors at the L4 striker pad locations. Refer to Step 4.J.(2).
11 Close the thrust reverser doors. Refer to Para. 4.D. with the changes as follows:
a Close the latches in the sequence that follows:

L1A latch,
L1B latch,
L4 latch,
L5 latch.

12 Adjust the star wheels on the L1A and L1B latches until the force necessary to close each latch is between 26 lbf (11.57 daN) and 30 lbf (13.34 daN).
a Make sure that you adjust each latch one at a time while the other latches are closed.
13 Adjust the star wheel on the L4 latch until the force necessary to close the latch is between 26 lbf (11.57 daN) and 30 lbf (13.34 daN).
14 Make sure that there is no gap between the forward L1 and aft L1 striker pads (22) on the left and right thrust reverser doors. If there is a gap between the forward L1 and aft L1 striker pads (22) on the left and right thrust reverser doors, do the following:
a Adjust the latch closing force of the L1A and L1B latches to a maximum of 36 lbf (16.01 daN) until there is no gap.
b If there is a gap after you adjust the latch closing force to 36 lbf (16.01 daN), add a shim to the applicable striker pad location. Then, go back to Step 4.B.(2)(c)11_.
15 Make sure that there is no gap between the L4 striker pads (6) on the left and right thrust reverser doors. If there is a gap of more than 0.01 in. (0.25 mm) between the L4 striker pads (6) on the left and right thrust reverser doors, do the following:
a

Thrust Reverser Adjustment - L4 Striker Pad Permitted Gap ** ON A/C NOT FOR ALL

b Adjust the latch closing force of the L4 latch to a maximum of 36 lbf (16.01 daN) until the gap is 0.01 in. (0.25 mm) or less.

NOTE: If the gap between the striker pads is less than 0.01 in. (0.25 mm), it will close when you adjust the L5 latch.

c If the gap is more than 0.01 in. (0.25 mm) after you adjust the latch closing force to 36 lbf (16.01 daN), add a shim. Then, go back to Step 4.B.(2)(c)11_.
(d) Do a check and adjust the V-blade and R7 lower bifurcation LE gaps.
1 Make sure that the V-blade and R7 lower bifurcation LE gaps are in tolerance. Refer to Step 4.B.(2)(b)1_.
2 If the V-blade or R7 lower bifurcation LE gaps are out of tolerance, adjust the six o'clock splitline gap until the gaps are in tolerance. Refer to Para. 4.E. Then, go back to Step 4.B.(2)(c)11_.
(e) Adjust the aft core cowl six o'clock splitline gap as follows:
1

Interface Gaps ** ON A/C NOT FOR ALL

2 If you cannot get the aft core cowl six o'clock splitline gap in tolerance with a maximum latch closing force of 30 lbf (13.34 daN), do the following:

CAUTION: DO NOT CLOSE THE L5 LATCH WITH A FORCE OF MORE THAN 50 LBF (22.68 KGF). IF YOU CLOSE THE L5 LATCH WITH A FORCE OF MORE THAN 50 LBF (22.68 KGF), YOU CAN CAUSE DAMAGE TO THE LATCH.

a Set the L5 latch losing force to 50 lbf (22.24 daN).
b Open and close the L5 latch five times to bed-in the seals.
c Go back to Step 4.B.(2)(e)1_.
(f) Adjust the L2, L3 and L5 latches.
1 Open the thrust reverser doors. Refer to Para. 4.D.
a Open all the latches in the sequence that follows:

L5 latch,
L4 latch,
L1B latch,
L1A latch.

2 Apply the modelling clay (Material No.PU1-0009) on the L2 and L3 latch striker pad locations.
3 Apply the modelling clay (Material No.PU1-0009) on the forward and aft sides of the L5 latch housing.
4 Close the thrust reverser doors. Refer to Para. 4.D. with the changes as follows:
a Close the latches in the sequence that follows:

L1A latch,
L1B latch,
L4 latch,
L5 latch.
Do not close the L2 and L3 latches at this time.

5 Open the thrust reverser doors. Refer to Para. 4.D. with the changes as follows:
a Open the latches in the sequence that follows:

L5 latch,
L4 latch,
L1B latch,
L1A latch.

6 Measure and record the clay thickness at the L2, L3 and L5 striker pad locations.

NOTE: If you used tape between the clay and the structure, add the thickness of the tape to the measurement of the clay.

7 Collect the number of shims and striker pads equal to the thickness of the clay you measured on Step 4.B.(2)(f)6_ for the L2 and L3 latches.

NOTE: If the thickness of the shims does not equal to the thickness of the clay, round the number of shims down to the next full shim.

8 Divide the shims you collected in Step 4.B.(2)(f)7_ equally between the left and right thrust reverser doors.

NOTE: If there is an odd number of shims, put the odd shim on the left thrust reverser door.

9 Install the striker pads and shims on the left and right thrust reverser doors at the L2 latch location. Refer to Step 4.J.(2).
10 Install the striker pads and shims on the left and right thrust reverser doors at the L3 latch location. Refer to Step 4.J.(2).
11 Measure the gap at the R7 lower bifurcation LE. Refer to Step 4.B.(2)(b)2_d_.
a If the gap at the R7 lower bifurcation LE is more than 0.511 in. (12.98 mm), remove a shim from the L2 latch location.

Make sure that the gap between the left and right thrust reverser L2 striker pads is between 0.001 in. (0.025 mm) and 0.013 in. (0.330 mm) when the L2 latch is open.

12 Collect the number of shims and striker pads equal to the smaller of the gaps you measured in Step 4.B.(2)(f)6_ for the L5 latch.

NOTE: If the thickness of the shims does not equal to the thickness of the clay, round the number of shims down to the next full shim.

13 Divide the shims you collected in Step 4.B.(2)(f)12_ equally between the left and right thrust reverser doors.

NOTE: If there is an odd number of shims, put the odd shim on the left thrust reverser door.

14 Install the striker pads and shims on the left and right thrust reverser doors at the L5 striker pad locations. Refer to Step 4.J.(2).
15 Close the thrust reverser doors. Refer to Para. 4.D. with the changes as follows:
a Close the latches in the sequence that follows:

L1A latch,
L1B latch,
L2 latch,
L3 latch,
L4 latch,
L5 latch.
Do not close the BLS latch at this time.

16 Open the L1A latch and adjust the closing force to between 30 lbf (13.34 daN) and 36 lbf (16.01 daN). Close the L1A latch.
17 Open the L1B latch and adjust the closing force to between 30 lbf (13.34 daN) and 36 lbf (16.01 daN). Close the L1B latch.
18 Open the L2 latch and adjust the closing force to between 30 lbf (13.34 daN) and 36 lbf (16.01 daN). Close the L2 latch.
19 Open the L3 latch and adjust the closing force to between 30 lbf (13.34 daN) and 36 lbf (16.01 daN). Close the L3 latch.
20 Open the L4 latch and adjust the closing force to between 30 lbf (13.34 daN) and 36 lbf (16.01 daN). Close the L4 latch.
21 Open the L5 latch and adjust the closing force to between 30 lbf (13.34 daN) and 36 lbf (16.01 daN). Close the L5 latch.
22 Do Step 4.B.(2)(f)16_ thru Step 4.B.(2)(f)21_ again. Refer to Para. 4.F.

Make sure that you adjust each latch one at a time while the other latches are closed.
Make sure that each latch closes with a force between 30 lbf (13.34 daN) and 36 lbf (16.01 daN).
Adjust each latch again as necessary.
If you adjust a latch, do Step 4.B.(2)(f)16_ thru Step 4.B.(2)(f)21_ again.

(g) Do a check of the V-blade and R7 lower bifurcation LE gaps. Refer to Step 4.B.(2)(d).
1 If the V-blade gap or gap at the R7 lower bifurcation LE are out of tolerance, go back to Step 4.B.(2)(b)1_ and adjust the applicable gap.
a Make sure that you keep the six o'clock splitline gap in tolerance while you adjust the V-blade gap or gap at the R7 lower bifurcation LE.
(h) Do a check of the latch closing force and the gaps between the related striker pads.
1 If you adjust the V-blade gap or gap at the R7 lower bifurcation LE in Step 4.B.(2)(g), measure the latch closing force for the L1A, L1B, L2, L3, L4 and L5 latches. Refer to Step 4.B.(2)(f)22_ and Para. 4.F.
2 Open the thrust reverser doors. Refer to Para. 4.D. with the changes as follows:
a Open the latches in the sequence that follows:

L5 latch,
L4 latch,
L3 latch,
L2 latch,
L1B latch,
L1A latch.

3 Apply the modelling clay (Material No.PU1-0009) to the striker pads at all the latch locations.
4 Close the thrust reverser doors. Refer to Para. 4.D. with the changes as follows:
a Close the latches in the sequence that follows:

L1A latch,
L1B latch,
L2 latch,
L3 latch,
L4 latch,
L5 latch.

5 Open the thrust reverser doors. Refer to Para. 4.D.
a Open the latches in the sequence that follows:

L5 latch,
L4 latch,
L3 latch,
L2 latch,
L1B latch,
L1A latch.

6 Make sure that there is a gap of 0.13 in. (3.30 mm) or less at the L1 upper striker pad location.
7 Make sure that there is no gap at all other striker pad locations.
a If there is a gap at one or more of these striker pad locations, do the following:

Adjust the closing force of each latch as necessary. Refer to Step 4.B.(2)(f)15_ thru Step 4.B.(2)(f)22_.
Make sure that the closing force of the latches are in the correct range and the striker pads touch. Refer to Step 4.B.(2)(h).
If you find a gap, add a shim as necessary.
Go back to Step 4.B.(2)(d).

(3) Adjust the IFS bumper.
(a) Measure and record the steps of the IFS upper bifurcation LE.

Thrust Reverser Adjustment - IFS Upper Bifurcation and R7 Lower Bifurcation Leading Edge Gaps ** ON A/C NOT FOR ALL

NOTE: If the surface of the IFS upper bifurcation is below the engine case, the measurement is negative. If it is above the engine case, the measurement is positive.

Thrust Reverser Adjustment - IFS Upper Bifurcation and R7 Lower Bifurcation Leading Edge Gaps ** ON A/C NOT FOR ALL

(b)

Thrust Reverser Adjustment - IFS Upper Bifurcation and R7 Lower Bifurcation Leading Edge Gaps ** ON A/C NOT FOR ALL

(c) Measure the IFS bumper gaps. Refer to Para. 4.G.
1 Open the thrust reverser doors. Refer to Para. 4.D. with the changes as follows:
a Open the latches in the sequence that follows:

L5 latch,
L4 latch,
L3 latch,
L2 latch,
L1B latch,
L1A latch.

2 Apply the modelling clay (Material No.PU1-0009) to the No. 1 upper bumpers and No. 2 upper bumpers on the left and right thrust reverser doors.
3 Apply the modelling clay (Material No.PU1-0009) to the No. 1 lower bumpers.
4

Thrust Reverser Adjustment - BLS Latch Clay Check ** ON A/C NOT FOR ALL

5 Close the thrust reverser doors. Refer to Para. 4.D. with the changes as follows:
a Close the latches in the sequence that follows:

L1A latch,
L1B latch,
L2 latch,
L3 latch,
L4 latch,
L5 latch.

6 Open the thrust reverser doors. Refer to Para. 4.D. with the changes as follows:
a Open the latches in the sequence that follows:

L5 latch,
L4 latch,
L3 latch,
L2 latch,
L1B latch,
L1A latch.

7 Measure and record the clay thickness of each bumper location and the BLS receiver cone.
(d) Adjust the IFS bumper gaps.
1 Set the No. 1 upper bumpers.
a

No. 1 Upper Bumper Gap ** ON A/C NOT FOR ALL

Find the gap for the No. 1 upper bumper on the left and right thrust reverser doors one at a time.

b Adjust the number of washers to a thickness equal to the values you found in Step 4.B.(3)(d)1_a_. Refer to Step 4.J.(1).

Adjust the IFS bumper pad and washers for the No. 1 upper bumper on the left and right thrust reverser doors one at a time.

2 Set the No. 2 upper bumpers.
a Adjust the number of washers until you get a gap to between 0.060 in. (1.524 mm) and 0.080 in. (2.032 mm) between the No. 2 upper bumpers.

See the measurements you made in Step 4.B.(3)(c)7_.
Collect the IFS bumper pad and washers for the No. 2 upper bumpers on the left and right thrust reverser doors one at a time.

b Install the IFS bumper pads and washers on the left and right thrust reverser doors at the No. 2 upper bumper locations. Refer to Step 4.J.(1).
3 Set the No. 1 lower bumpers.
a

No. 1 Lower Bumper Gap ** ON A/C NOT FOR ALL

b Adjust the number of washers (24) until you get the gap you found in Step 4.B.(3)(d)3_a_.
c Divide the number of washers you adjusted in Step 4.B.(3)(d)3_b_ equally between the left and right thrust reverser doors.

NOTE: If there is an odd number of washers, put the odd washer on the left thrust reverser door.

d Install the IFS bumper pads and washers on the left and right thrust reverser doors at the No. 1 lower bumper locations. Refer to Step 4.J.(1).
4 Set the BLS gap.
a

BLS Gap ** ON A/C NOT FOR ALL

b If necessary, remove the BLS thermal blanket from the right thrust reverser door to get access to the BLS latch pin (Ref. AMM TASK 78-32-71-000-802).
c Adjust the star wheel on the BLS latch pin to increase or decrease the gap between the BLS latch pin and BLS receiver until the gap agrees with the clearance you found in Step 4.B.(3)(d)4_a_. Use the WRENCH - HEXAGONAL 0.109 in. (2.77 mm).
d Adjust the closing force of the BLS latch to between 30 lbf (13.34 daN) and 36 lbf (16.01 daN) and close the BLS latch.
e When you complete the adjustment of the BLS gap, install the BLS thermal blanket (Ref. AMM TASK 78-32-71-400-802).
(4) Adjust the NAI bumper.
(a) Open the thrust reverser doors. Refer to Para. 4.D. with the changes as follows:
1 Open the latches in the sequence that follows:

L5 latch,
L4 latch,
L3 latch,
BLS latch,
L2 latch,
L1B latch,
L1A latch.

(b) Make sure that the NAI bumpers and shims were removed. Refer to Step 4.J.(3).
(c)

Thrust Reverser Adjustment - Modelling Clay and Release Agent Locations for NAI Bumper Plate ** ON A/C NOT FOR ALL

(d) Apply the release agent (Material No.PU5-0004) on the left and right sides of the NAI bumper plate.
(e) Close the thrust reverser doors. Refer to Para. 4.D. with the changes as follows:
1 Close the latches in the sequence that follows:

L1A latch,
L1B latch,
L2 latch,
BLS latch,
L3 latch,
L4 latch,
L5 latch.

(f) Open the thrust reverser doors. Refer to Para. 4.D. with the changes as follows:
1 Open the latches in the sequence that follows:

L5 latch,
L4 latch,
L3 latch,
BLS latch,
L2 latch,
L1B latch,
L1A latch.

(g) Measure the thickness of the clay on the NAI fitting assembly locations.
(h) Subtract 0.912 in. (23.16 mm) from the value on the left NAI fitting assembly location that you measured in Step 4.B.(4)(g).

NOTE: When the NAI bumper (12) is compressed, its nominal thickness is 0.912 in. (23.16 mm).

(i) Collect the number of shims (11) equal to the thickness that you calculated in Step 4.B.(4)(h) plus or minus 0.02 in. (0.51 mm).
(j) Install the left bumper (12) and shims (11) on the left NAI fitting assembly. Refer to Step 4.J.(3).
(k) Subtract 0.912 in. (23.16 mm) from the thickness on the right NAI fitting assembly location that you measured in Step 4.B.(4)(g).

NOTE: When the NAI bumper (12) is compressed, its nominal thickness is 0.912 in. (23.16 mm).

(l) Collect the number of shims (11) equal to the thickness that you calculated in Step 4.B.(4)(k) plus or minus 0.02 in. (0.51 mm).
(m) Install the right bumper (12) and shims (11) on the right NAI fitting assembly. Refer to Step 4.J.(3).
(5) Tighten the fasteners on the left and right thrust reverser doors at the following locations. Refer to Step 4.J.(3).

Forward and aft L1 striker pad locations,
Upper L1 striker pad locations,
L4 striker pad locations,
L2 striker pad locations,
L3 striker pad locations,
L5 striker pad locations,
No. 1 upper bumper, No. 2 upper bumper and No. 1 lower bumper locations,
NAI bumper locations.

Subtask 78-30-00-280-050-A ** ON A/C NOT FOR ALL

C. Troubleshooting Procedures
(1) Use this troubleshooting procedure to correct out-of-tolerance conditions on thrust reverser doors.
(a) If you find an out of tolerance condition that is not given in this troubleshooting procedure, do the full rigging procedure. Refer to Para. 4.B.
(b) If you do more than one troubleshooting procedure, do the full check procedure after you complete all the troubleshooting procedures. Refer to Para. 4.A.
(c) If you complete the full check procedure and find more out-of-tolerance conditions, you must do Para. 4.C. again for the out-of-tolerance conditions or the full adjustment procedure. Refer to Para. 4.B for the full adjustment procedure.
(2) Troubleshooting procedure for the latches.
(a) If there is a gap at the L1 lower striker pads, do as follows:
1 Set the closing force for the L1A and L1B latches to between 26 lbf (11.57 daN) and 30 lbf (13.34 daN) one at a time.
2

Interface Gaps ** ON A/C NOT FOR ALL

3 Measure the gap between the L1 striker pads on the left and right thrust reverser doors.
a Measure the aft and the forward locations.
4 Adjust the thickness of the shims equal to the gap you measured in Step 4.C.(2)(a)3_. Refer to Step 4.J.(2).
a Do the adjustment for the aft and forward L1 striker pad locations one at a time.
b Adjust the number of shims as necessary.
c Make sure that the number of shims at the L1 upper striker pad location equals the number of shims at the aft L1 striker pad location.
d Make sure that the forward and aft L1 striker pads on the left and right thrust reverser doors touch.
5 Set the closing force for the L1A and L1B latches to between 30 lbf (13.34 daN) and 36 lbf (16.01 daN) one at a time.
6 If the thickness of shims you added in Step 4.C.(2)(a)4_ is 0.026 in. (0.66 mm) or less, do the following:
a Do a check of the latch closing forces for all the latches and the gaps between the related striker pads. Refer to Step 4.A.(5).
b Do a check of the gap between the V-blade and engine V-groove. Refer to Step 4.A.(6).
c Do a check of the gap at the R7 lower bifurcation LE. Refer to Step 4.A.(7).
7 If the thickness of the shims you added in Step 4.C.(2)(a)4_ is 0.027 in. (0.69 mm) or more, do the following:
a Do a check af the latch closing force for all the latches and the gaps between the related striker pads. Refer to Step 4.A.(5).
b Do a check of the gap between the V-blade and engine V-groove. Refer to Step 4.A.(6).
c Do a check of the gap at the R7 lower bifurcation LE. Refer to Step 4.A.(7).
d Do a check of the IFS bumper gaps. Refer to Step 4.A.(8).
(b) If there is a gap between the L2 striker pads, do as follows:
1 Make sure that the thrust reverser doors are closed. Refer to Para. 4.D.
2 Open the L2 latch and set the closing force to between 26 lbf (11.57 daN) and 30 lbf (13.34 daN) while the remaining latches are closed.
3

Interface Gaps ** ON A/C NOT FOR ALL

4 Open the L2 latch. Do not open the other latches.
5 Measure the gap between the L2 striker pads on the left and right thrust reverser doors while the l2 latch is open.

NOTE: A gap between 0.001 in. (0.025 mm) and 0.013 in. (0.330 mm) is permitted between the L2 striker pads on the left and right thrust reverser doors while the L2 latch is open.

a Measure between the striker pad fasteners.
6 Adjust the number of shims necessary to get a gap to between 0.001 in. (0.025 mm) and 0.013 in. (0.330 mm) between the L2 striker pads on the left and right thrust reverser doors. Refer to Step 4.J.(2).
a If there is an odd number of shims, put the odd shim on the left thrust reverser door.
7 Set the closing force for the L2 latch to between 30 lbf (13.34 daN) and 36 lbf (16.01 daN).
8 If the thickness of the shims you added in Step 4.C.(2)(b)6_ is 0.026 in. (0.66 mm) or less, do the following:
a Do a check of the latch closing forces for all the latches and the gaps between the related striker pads. Refer to Step 4.A.(5).
b Do a check of the gap at the R7 lower bifurcation LE. Refer to Step 4.A.(7).
9 If the thickness of the shims you added in Step 4.C.(2)(b)6_ is 0.027 in. (0.69 mm) or more, do the following:
a Do a check of the latch closing forces for all the latches and the gaps between the related striker pads. Refer to Step 4.A.(5).
b Do a check of the gap between the V-blade and engine V-groove. Refer to Step 4.A.(6).
c Do a check of the gap at the R7 lower bifurcation LE. Refer to Step 4.A.(7).
d Do a check of the IFS bumper gaps. Refer to Step 4.A.(8).
(c) If there is a gap between the L3 striker pads, do as follows:
1 Make sure that the thrust reverser doors are closed. Refer to Para. 4.D.
2 Open the L3 latch and set the closing force to between 26 lbf (11.57 daN) and 30 lbf (13.34 daN) while the remaining latches are closed.
3

Interface Gaps ** ON A/C NOT FOR ALL

4 Open the L3 latch. Do not open the other latches.
5 Measure the gap between the L3 striker pads on the left and right thrust reverser doors.
a Measure between the striker pad fasteners.
6 Adjust the number of shims equal to the gap you measured in Step 4.C.(2)(c)5_. Refer to Para. 4.J.
a If the thickness of the shims does not equal the thickness of the clay, round the number of shims down to the next full shim.
b If there is an odd number of shims, put the odd shim on the left thrust reverser door.
c Make sure that the L3 striker pads on the left and right thrust reverser doors touch.
7 Set the closing force for the L3 latch to between 30 lbf (13.34 daN) and 36 lbf (16.01 daN).
8 If the thickness of the shims you added in Step 4.C.(2)(c)6_ is 0.026 in. (0.66 mm) or less, do the following:
a Do a check of the latch closing forces for all the latches and the gaps between the related striker pads. Refer to Step 4.A.(5).
b Do a check of the gap at the R7 lower bifurcation LE. Refer to Step 4.A.(7).
9 If the thickness of the shims you added in Step 4.C.(2)(c)6_ is 0.027 in. (0.69 mm) or more, do the following:
a Do a check of the latch closing forces for all the latches and the gaps between the related striker pads. Refer to Step 4.A.(5).
b Do a check of the gap between the V-blade and engine V-groove. Refer to Step 4.A.(6).
c Do a check of the gap at the R7 lower bifurcation LE. Refer to Step 4.A.(7).
d Do a check of the IFS bumper gaps. Refer to Step 4.A.(8).
(d) If there is a gap between the L4 striker pads, do as follows:
1 Make sure that the thrust reverser doors are closed. Refer to Para. 4.D.
2 Open the L4 latch and set the closing force to between 26 lbf (11.57 daN) and 30 lbf (13.34 daN).
a Close the L4 latch.
3

Interface Gaps ** ON A/C NOT FOR ALL

4 Measure the gap between the L4 striker pads on the left and right thrust reverser doors while the L4 latch is closed.
a

Thrust Reverser Adjustment - L4 Striker Pad Permitted Gap ** ON A/C NOT FOR ALL

5 Open the L4 latch. Do not open the other latches.
6 Adjust the number of shims equal to the gap you measured in Step 4.C.(2)(d)4_. Refer to Step 4.J.(2).
a If the thickness of the shims does not equal the thickness of the clay, round the number of shims up to the next full shim.
b If there is an odd number of shims, put the odd shim on the left thrust reverser door.
c Make sure that the L4 striker pads on the left and right thrust reverser doors touch.
d

Thrust Reverser Adjustment - L4 Striker Pad Permitted Gap ** ON A/C NOT FOR ALL

7 Set the closing force for the L4 latch to between 30 lbf (13.34 daN) and 36 lbf (16.01 daN).
8 If the thickness of shims you added in Step 4.C.(2)(d)6_ is 0.026 in. (0.66 mm) or less, do the following:
a Do a check of the latch closing forces for all the latches and the gaps between the related striker pads. Refer to Step 4.A.(5).
b Do a check of the gap at the R7 lower bifurcation LE. Refer to Step 4.A.(7).
9 If the thickness of shims you added in Step 4.C.(2)(d)6_ is 0.027 in. (0.69 mm) or more, do the following:
a Do a check of the latch closing forces for all the latches and the gaps between the related striker pads. Refer to Step 4.A.(5).
b Do a check of the gap between the V-blade and engine V-groove. Refer to Step 4.A.(6).
c Do a check of the gap at the R7 lower bifurcation LE. Refer to Step 4.A.(7).
d Do a check of the IFS bumper gaps. Refer to Step 4.A.(8).
(e) If the necessary closing force of the L4 latch handle is more than 30 lbf (13.34 daN) to get the six o'clock splitline gap in tolerance, do as follows:
1 Set the closing force for the L3 latch to between 34 lbf (15.12 daN) and 36 lbf (16.01 daN).
2 Do a check of the L4 latch closing force.
3 If the closing of the L4 latch handle is more than 30 lbf (13.34 daN) to get the six o'clock splitline gap in tolerance, do the following:
a Open the L2 latch. Do not open the other latches.
b Make sure that the gap between the L2 striker pads on the left and right thrust reverser doors is between 0.001 in. (0.025 mm) and 0.013 in. (0.330 mm) while the L2 latch is open.
c If the L2 striker pads on the left and right thrust reverser doors touch, adjust the number of shims to get a clearance to between 0.001 in. (0.025 mm) and 0.013 in. (0.330 mm) while the L2 latch is open. Refer to Para. 4.J.
d Close the L2 latch.
e Do a check of the L2 latch closing force.

Make sure that the L2 striker pads touch when the L2 latch is closed. Refer to Step 4.A.(5).

4 Open the thrust reverser doors. Refer to Para. 4.D.
5 Remove the striker pad and shims from the L4 latch keeper location on the right thrust reverser door. Refer to Step 4.J.(2).
6 Adjust the L4 latch closing force to between 30 lbf (13.34 daN) and 32 lbf (14.23 daN) while the other latches are closed.
7

Interface Gaps ** ON A/C NOT FOR ALL

8 If the six o'clock splitline gap is out of tolerance, do the full adjustment procedure. Refer to Para. 4.B.
9 Open the thrust reverser doors. Refer to Para. 4.D.
10

Thrust Reverser Adjustment - L4 Striker Pad Permitted Gap ** ON A/C NOT FOR ALL

11 Close the thrust reverser doors. Refer to Para. 4.D.
12 Open the thrust reverser doors. Refer to Para. 4.D.
13 Measure the thickness of the clay at the L4 latch keeper location.
14 Adjust the number of shims and striker pad equal to the gap you measured in Step 4.C.(2)(e)13_. Refer to Step 4.J.(2).
a If the thickness of the shims does not equal the thickness of the clay, round the number of shims up to the next full shim.
b If there is an odd number of shims, put the odd shim on the left thrust reverser door.
15 Close the thrust reverser doors. Refer to Para. 4.D.
16 Do a check of the latch closing forces for all the latches and the gaps between the related striker pads. Refer to Step 4.A.(5).
17 Do a check of the gap between the V-blade and engine V-groove. Refer to Step 4.A.(6).
18 Do a check of the gap at the R7 lower bifurcation LE. Refer to Step 4.A.(7).
19 Do a check of the IFS bumper gaps. Refer to Step 4.A.(8).
(f) If there is no contact at the L5 striker pads, do as follows:
1 Set the closing force for the L5 latch to between 26 lbf (11.57 daN) and 30 lbf (13.34 daN).
a Close the L5 latch.
2

Interface Gaps ** ON A/C NOT FOR ALL

3 If the closing force of the L5 latch is more than 30 lbf (13.34 daN) to get the aft core cowl six o'clock splitline gap in tolerance, do as follows:
a Remove the striker pads and shims from the L5 striker pad locations on the left and right thrust reverser doors. Refer to Step 4.J.(2).
b Set the closing force for the L5 latch to 50 lbf (22.24 daN).
c Open and close the L5 latch five times to bed-in the seals.
d Install the striker pads and shims at the L5 striker pad locations on the left and right thrust reverser doors. Refer to Step 4.J.(2).
e Do the Step 4.C.(2)(f)1_ again.
f If the necessary closing force of the L5 latch is more than 30 lbf (13.34 daN) to get the aft core cowl six o'clock splitline gap in tolerance, do Step 4.C.(2)(g).

If the necessary closing force is 30 lbf (13.34 daN) or less, continue to Step 4.C.(2)(f)4_.

4 Measure the gap between the L5 striker pads on the left and right thrust reverser doors.
a Measure the aft and forward surface of the striker pads.
b Apply the modelling clay (Material No.PU1-0009) on the forward and aft sides of the L5 striker pads.
c Close the thrust reverser doors. Refer to Para. 4.D.
d Open the thrust reverser doors. Refer to Para. 4.D.
e Measure the thickness of the clay between the L5 striker pads.
5 Install the striker pad and shims equal to the smaller gap you measured in Step 4.C.(2)(f)4_. Refer to Para. 4.J.
6 Set the closing force for the L5 latch to between 30 lbf (13.34 daN) and 36 lbf (16.01 daN).
7 If the thickness of shims you added in Step 4.C.(2)(f)5_ is 0.026 in. (0.66 mm) or less, do the following:
a Do a check of the latch closing forces for all the latches. Refer to Step 4.A.(5).
b Do a check of the gap at the R7 lower bifurcation LE. Refer to Step 4.A.(7).
8 If the number of shims you adjusted in Step 4.C.(2)(c)6_ is 0.027 in. (0.69 mm) or more, do the following:
a Do a check of the latch closing forces for all the latches and the gaps between the related striker pads. Refer to Step 4.A.(5).
b Do a check of the gap between the V-blade and engine V-groove. Refer to Step 4.A.(6).
c Do a check of the gap at the R7 lower bifurcation LE. Refer to Step 4.A.(7).
d Do a check of the IFS bumper gaps. Refer to Step 4.A.(8).
(g) If the necessary closing force of the L5 latch handle to get the correct aft core cowl six o'clock splitline gap is more than 30 lbf (13.34 daN), do as follows:
1 Remove the striker pads and shims from the L5 striker pad locations on the left and right thrust reverser doors. Refer to Step 4.J.(2).
2 Measure and record the thickness of the striker pads and the number of shims.
3 Set the closing force for the L5 latch to 50 lbf (22.24 daN).
4 Slowly, close the L5 latch.
a Make sure that the left core cowl do not hit the right core cowl at the aft core cowl six o'clock splitline.
5 Open the L5 latch.
6 Do Step 4.C.(2)(g)4_ and Step 4.C.(2)(g)5_ four more times to bed-in the seals.
7 Set the closing force for the L5 latch to between 30 lbf (13.34 daN) and 32 lbf (14.23 daN).
8 Close the L5 latch.
9

Interface Gaps ** ON A/C NOT FOR ALL

10 Measure the gap between the L5 striker pads on the left and right thrust reverser doors.
a Measure the aft and forward surface on the striker pads.
b Apply the modelling clay (Material No.PU1-0009) on the forward and aft sides of the L5 striker pads.
c Close the thrust reverser doors. Refer to Para. 4.D.
d Open the thrust reverser doors. Refer to Para. 4.D.
e Measure the thickness of the clay between L5 striker pads.
11 Install the striker pad and shims to the smaller gap you measured in Step 4.C.(2)(g)10_. Refer to Para. 4.J.
12 Set the closing force for the L5 latch to between 34 lbf (15.12 daN) and 36 lbf (16.01 daN).
13 If the thickness of shims adjusted in Step 4.C.(2)(g)11_ is 0.026 in. (0.66 mm) or less, do the following:
a Do a check of the latch closing forces for all the latches and the gaps between the related striker pads. Refer to Step 4.A.(5).
b Do a check of the gap at the R7 lower bifurcation LE. Refer to Step 4.A.(7).
14 If the thickness of shims adjusted in Step 4.C.(2)(g)11_ is 0.027 in. (0.69 mm) or more, do the following:
a Do a check of the latch closing forces for all the latches and the gaps between the related striker pads. Refer to Step 4.A.(5).
b Do a check of the gap between the V-blade and engine V-groove. Refer to Step 4.A.(6).
c Do a check of the gap at the R7 lower bifurcation LE. Refer to Step 4.A.(7).
d Do a check of the IFS bumper gaps. Refer to Step 4.A.(8).
(3) Troubleshooting procedure for the V-blade gap.
(a) Remove the one shim from the L1 striker pad location, one shim from the forward striker pad location, and one shim from the upper L1 striker pad location. Refer to Para. 4.J.
1 Keep the shims to measure.
2 If you remove one shim from one L1 striker pad location, you must remove one shim each from the other two L1 striker pad locations at the same time.
(b) Set the closing force for the L1A and L1B latches to between 26 lbf (11.57 daN) and 30 lbf (13.34 daN) one at a time.
(c)

Interface Gaps ** ON A/C NOT FOR ALL

(d) Measure the gap along the interface of the V-blade and the engine V-groove.
1 Make sure that the V-groove and V-blade are in contact.
2 The maximum permissible gap is 0.030 in. (0.762 mm) or less.
(e) If the V-blade gap is out of tolerance, go back to Step 4.C.(3)(a).
(f) Set the closing force for the L1A and L1B latches to between 30 lbf (13.34 daN) and 36 lbf (16.01 daN) one at a time.
(g) Measure the thickness of the shims you removed in Step 4.C.(3)(a).
1 Measure the shims for one L1 striker pad location at a time.
2 Record the largest of the three thicknesses.
(h) If the largest of the three thicknesses you measured in Step 4.C.(3)(g) is 0.026 in. (0.66 mm) or less, do the following:
1 Do a check of the latch closing forces for all the latches and the gaps between the related striker pads. refer to Step 4.A.(5).
2 Do a check of the gap between the V-blade and engine V-groove. Refer to Step 4.A.(6).
3 Do a check of the gap at the R7 lower bifurcation LE. Refer to Step 4.A.(7).
(i) If the thickness of the shims you adjusted in Step 4.C.(2)(c)6_ is 0.027 in. (0.69 mm) or more, do the following:
1 Do a check of the latch closing forces for all the latches and the gaps between the related striker pads. Refer to Step 4.A.(5).
2 Do a check of the gap between the V-blade and engine V-groove. Refer to Step 4.A.(6).
3 Do a check of the gap at the R7 lower bifurcation LE. Refer to Step 4.A.(7).
4 Do a check of the IFS bumper gaps. Refer to Step 4.A.(8).
(4) Troubleshooting procedure for the gap at the R7 lower bifurcation LE.
(a) If the gap at the R7 lower bifurcation LE is out of tolerance, do the full adjustment procedure. Refer to Step 4.B.
(5) Troubleshooting procedure for the IFS bumper gaps.
(a) If the IFS bumper gaps are out of tolerance, adjust them. Refer to Step 4.B.(3).

Subtask 78-30-00-010-109-A ** ON A/C NOT FOR ALL

D. Opening and Closing of the Thrust Reverser Doors
Perform this paragraph to open or close the thrust reverser doors when told to in the check procedure, full rigging procedure, or troubleshooting procedures.
(1) When you open or close the thrust reverser doors, refer to (Ref. AMM TASK 78-36-00-010-802) and (Ref. AMM TASK 78-36-00-410-802).
(a) Make sure that you obey the instructions unless told to differently in the check procedure, full rigging procedure, or troubleshooting procedures.
(2) Open or close the latches as told to in the applicable steps in the check procedures, full rigging procedure, or troubleshooting procedures.
(3) Always use the closure assist assembly when you latch and unlatch the thrust reverser doors.

Subtask 78-30-00-720-052-A ** ON A/C NOT FOR ALL

E. Six O'clock Splitline Gap Adjustment
Perform this paragraph to adjust the six o’clock splitline gap as specified in the check procedure, full rigging procedure, or troubleshooting procedures.

NOTE: The six o'clock splitline gap can change while you do the rigging procedure.

(1) Make sure that you keep the gap at the L4 latch location is within 0.030 in. (0.76 mm) of the gap at the L1 latch location.
(2) Make sure that the six o'clock splitline gap is 0.040 in. (1.02 mm) or larger.
(3) After you adjust the L1B and L4 six o'clock splitline gaps, keep the L1B latch closed while you do the remaining rigging procedure.
(4) Close the L1B latch.
(5) Measure the six o'clock splitline gap between the left and right latch beam panels below the shear pin at the L1B latch position.
(6) Adjust the star wheel on the L1B latch to decrease the six o'clock splitline gap between the left and right latch beam panels in increments of 0.020 in. (0.51 mm).
(7) Close the L4 latch.
(8) Measure the six o'clock splitline gap between the left and right latch beam panels below the shear pin at the L4 latch location.

CAUTION: WHEN YOU ADJUST THE 6 O’CLOCK SPLITLINE GAP, DO NOT CLOSE THE L4 LATCH WITH A FORCE OF MORE THAN 30 LBF (13.61 KGF). IF YOU CLOSE THE L4 LATCH WITH A FORCE MORE THAN 30 LBF (13.61 KGF), YOU CAN CAUSE DAMAGE TO IT.

(9) Adjust the star wheel on the L4 latch to decrease the six o'clock splitline gap between the left and right latch beam panels in increments of 0.020 in. (0.51 mm).
(a) Do this until the gap at the L4 location is within 0.030 in. (0.76 mm) of the gap you adjusted at the L1 location in Step 4.E.(7).

Subtask 78-30-00-800-050-A ** ON A/C NOT FOR ALL

F. Latch Closing Force Measurement
Perform this paragraph to measure the closing force of latches when specified in the check procedure, full rigging procedure, or troubleshooting procedures.
(1) Make sure that you close all the latches that you adjusted before.
(2) Put theGAGE - PUSH-PULL (0 lbf (0 daN) to 100 lbf (44 daN)) at the tool hole that is 0.5 in. (12.7 mm) from the edge of the latch handle.
(3) Measure the force necessary to close the latch.
(a) Make sure that the GAGE - PUSH-PULL (0 lbf (0 daN) to 100 lbf (44 daN)) is perpendicular to the latch handle.

Subtask 78-30-00-800-051-A ** ON A/C NOT FOR ALL

G. IFS and BLS Bumper Gap Measurement
Perform this paragraph to measure the IFS bumpers when specified in the check procedure, full rigging procedure, or troubleshooting procedures.

NOTE: This paragraph gives the instructions to use modelling clay to measure gaps. Alternative methods (for example, feeler gauge, gap gun, tooling sensors, and such) are permissible if they are sufficiently accurate.

(1) For the No. 1 upper bumper, No. 2 upper bumper, and No. 1 lower bumpers, measure the gap from the outer surface of the bumper pad.
(a)

Thrust Reverser Adjustment - Bumper Pad Measurement ** ON A/C NOT FOR ALL

(2)

Thrust Reverser Adjustment - BLS Latch Clay Check ** ON A/C NOT FOR ALL

Subtask 78-30-00-800-052-A ** ON A/C NOT FOR ALL

H. L4 Permitted Gap
This paragraph gives the permitted limits of the gap at the L4 striker pad.
(1) The surfaces between the fasteners of the L4 striker pads on the left and right thrust reverser doors must touch.
(2)

Thrust Reverser Adjustment - L4 Striker Pad Permitted Gap ** ON A/C NOT FOR ALL

Subtask 78-30-00-960-050-A ** ON A/C NOT FOR ALL

I. Removal and Installation of the Striker Pads, IFS Bumper Pads, and NAI Bumper
Perform this paragraph to remove and install the striker pads, IFS bumper pads, and NAI bumpers if necessary when you do the check procedure, troubleshooting procedure, or full adjustment procedure.
(1)

Thrust Reverser Adjustment - Removal and Installation of IFS Bumper Pads, NAI Bumpers, and Striker Pads ** ON A/C NOT FOR ALL

PRE SB GRAA320NEO-A-78-30-00-0009-00001-930A-D

(a) Remove the IFS bumper pads as follows:
1 Remove the bolt (1), bumper pad (2) and washers (3) from the No. 1 upper bumper, No. 2 upper bumper or No. 1 lower bumper locations of the left thrust reverser door.
2 Remove the bolt (1), bumper pad (2) and washers (3) from the No. 1 upper bumper, No. 2 upper bumper or No. 1 lower bumper locations of the right thrust reverser door.

END OF PRE SB GRAA320NEO-A-78-30-00-0009-00001-930A-D

POST SB GRAA320NEO-A-78-30-0009-00001-930A-D

(b) Remove the IFS bumper pads as follows:
1 Remove the screws (4), bumper pad (2) and washers (3) from the No. 1 upper bumper, No. 2 upper bumper or No. 1 lower bumper locations of the left thrust reverser door.
2 Remove the screws (4), bumper pad (2) and washers (3) from the No. 1 upper bumper, No. 2 upper bumper or No. 1 lower bumper locations of the right thrust reverser door.

END OF POST SB GRAA320NEO-A-78-30-0009-00001-930A-D

PRE SB GRAA320NEO-A-78-30-0009-00001-930A-D

(c) Install the IFS bumper pads as follows:
1 Collect the number of washers (3) equal to the gap you recorded during adjustment.
2 Apply the anti-seize compound (Material No.PU5-0005) to the lowest 0.5 in. (12.7 mm) of threads on the bolt (1).
3 Mix the base primer (Material No.PU4-0010) with the activator (Material No.PU4-0011) and thinner (Material No.PU4-0012) . Refer to the manufacturer's instructions.

CAUTION: DO NOT INSTALL MORE THAN 0.30 IN. (7.62 MM) THICKNESS OF WASHERS AT EACH BUMPER POSITION ON EACH THRUST REVERSER HALF. TOO MANY WASHERS CAN CAUSE THE BOLT TO NOT ENGAGE THE LOCKING FEATURE SUFFICIENTLY. THIS CAN CAUSE THE BOLT, BUMPER PAD, AND WASHERS TO DISENGAGE FROM THE THRUST REVERSER.

CAUTION: MAKE SURE THAT THE PRIMER MIXTURE DOES NOT GO ON THE THREADS OF THE BOLT OR ON THE HELICOIL IN THE BOLT HOLE. IF THERE IS PRIMER MIXTURE ON THE THREADS OR ON THE HELICOIL, THE HELICOIL CAN BECOME DAMAGED DURING SUBSEQUENT REMOVAL OF THE BOLT.

4 Install the bumper pad (2) and washers (3) at the No. 1 upper bumper, No. 2 upper bumper or No. 1 lower bumper locations of the left thrust reverser door with the bolt (1).
a Wet install the fastener with the base primer (Material No.PU4-0010) mixture.
b Tighten the bolt (1) by hand.
c Do not torque the bolt (1) at this time.
5 Install the bumper pad (2) and washers (3) at the No. 1 upper bumper, No. 2 upper bumper or No. 1 lower bumper locations of the right thrust reverser door with the bolt (1).
a Wet install the fastener with the base primer (Material No.PU4-0010) mixture.
b Tighten the bolt (1) by hand.
c Do not torque the bolt (1) at this time.
6 When you complete the adjustment of the washers (3):
a the bolts (1) to between 105 and 95 lbf.in (1.19 and 1.07 m.daN )

.

END OF PRE SB GRAA320NEO-A-78-30-0009-00001-930A-D

POST SB GRAA320NEO-A-78-30-0009-00001-930A-D

(d) Install the IFS bumper pads as follows:
1 Collect the number of washers (3) equal to the gap you recorded during adjustment.
2 Apply anti-seize compound (Material No.PU5-0005) to the lowest 0.5 in. (12.7 mm) of threads on the screw (4).
3 Mix the base primer (Material No.PU4-0010) with the activator (Material No.PU4-0011) and thinner (Material No.PU4-0012) . Refer to the manufacturer's instructions.

4 Install the bumper pad (2) and washers (3) at the No. 1 upper bumper, No. 2 upper bumper or No. 1 lower bumper locations of the left thrust reverser door with the screw (4).
a Wet install the fastener with the base primer (Material No.PU4-0010) mixture.
b Tighten the screw (4) by hand.
c Do not torque the screw (4) at this time.
5 Install the bumper pad (2) and washers (3) at the No. 1 upper bumper, No. 2 upper bumper or No. 1 lower bumper locations of the right thrust reverser door with the screw (4).
a Wet install the fastener with the base primer (Material No.PU4-0010) mixture.
b Tighten the screw (4) by hand.
c Do not torque the screw (4) at this time.
6 When you complete the adjustment of the washers (3):
a TORQUE the screws (4) to between 130 and 117 lbf.in (1.47 and 1.32 m.daN )

.

END OF PRE SB GRAA320NEO-A-78-30-0009-00001-930A-D

(2)

Thrust Reverser Adjustment - Removal and Installation of IFS Bumper Pads, NAI Bumpers, and Striker Pads ** ON A/C NOT FOR ALL

(a) Remove the forward L1 striker pad as follows:
1 Remove the two bolts (9), striker pad (6) and shims (7) from the forward L1 striker pad location of the left thrust reverser door.
2 Remove the two bolts (9), striker pad (6) and shims (7) from the forward L1 striker pad location of the right thrust reverser door.
(b) Remove the aft L1 striker pad as follows:
1 Remove the two bolts (8), striker pad (6) and shims (7) from the aft L1 striker pad location of the left thrust reverser door.
2 Remove the two bolts (8), striker pad (6) and shims (7) from the aft L1 striker pad location of the right thrust reverser door.
(c) Remove the upper L1 striker pad as follows:
1 Remove the two bolts (5), striker pad (6) and shims (7) from the upper L1 striker pad location of the left thrust reverser door.
2 Remove the two bolts (5), striker pad (6) and shims (7) from the upper L1 striker pad location of the right thrust reverser door.
(d) Remove the L2 striker pad as follows:
1 Remove the two bolts (8), striker pad (6) and shims (7) from the L2 striker pad location of the left thrust reverser door.
2 Remove the two bolts (8), striker pad (6) and shims (7) from the L2 striker pad location of the right thrust reverser door.
(e) Remove the L3 striker pad as follows:
1 Remove the two bolts (9), striker pad (6) and shims (7) from the L3 striker pad location of the left thrust reverser door.
2 Remove the two bolts (9), striker pad (6) and shims (7) from the L3 striker pad location of the right thrust reverser door.
(f) Remove the L4 striker pad as follows:
1 Remove the two bolts (9), striker pad (14) and shims (15) from the L4 striker pad location of the left thrust reverser door.
2 Remove the two bolts (9), striker pad (14) and shims (15) from the L4 striker pad location of the right thrust reverser door.
(g) Remove the L5 striker pad as follows:
1 Remove the two bolts (16), striker pad (17) and shims (18) from the L5 striker pad location of the left thrust reverser door.
2 Remove the two bolts (16), striker pad (19) and shims (18) from the L5 striker pad location of the right thrust reverser door.
(h) Install the forward L1 striker pad as follows:
1 Collect the number of shims (7) equal to the gap you recorded during adjustment.
2 Install the striker pad (6) and shims (7) at the forward L1 striker pad location on the left thrust reverser door with the two bolts (9).
a Tighten the bolts (9) by hand.
b Do not torque the bolts (9) at this time.
3 Install the striker pad (6) and shims (7) at the forward L1 striker pad location on the right thrust reverser door with the two bolts (9).
a Tighten the bolts (9) by hand.
b Do not torque the bolts (9) at this time.
4 When you complete the adjustment of the shims (7):
a TORQUE the bolts (9) to between 20 and 18 lbf.in (0.226 and 0.203 m.daN )

.
(i) Install the aft L1 striker pad as follows:
1 Collect the number of shims (7) equal to the gap you recorded during adjustment.
2 Install the striker pad (6) and shims (7) at the aft L1 striker pad location on the left thrust reverser door with the two bolts (8).
a Tighten the bolts (8) by hand.
b Do not torque the bolts (8) at this time.
3 Install the striker pad (6) and shims (7) at the aft L1 striker pad location on the right thrust reverser door with the two bolts (8).
a Tighten the bolts (8) by hand.
b Do not torque the bolts (8) at this time.
4 When you complete the adjustment of the shims (7):
a TORQUE the bolts (8) to between 20 and 18 lbf.in (0.226 and 0.203 m.daN )

.
(j) Install the upper L1 striker pad as follows:
1 Collect the same number of shims (7) that you collected for the aft L1 striker pad location.

2 Install the striker pad (6) and shims (7) at the upper L1 striker pad location on the left thrust reverser door with the two bolts (5).
a Tighten the bolts (5) by hand.
b Do not torque the bolts (5) at this time.
3 Install the striker pad (6) and shims (7) at the upper L1 striker pad location on the right thrust reverser door with the two bolts (5).
a Tighten the bolts (5) by hand.
b Do not torque the bolts (5) at this time.
4 When you complete the adjustment of the shims (7):
a TORQUE the bolts (5) to between 20 and 18 lbf.in (0.226 and 0.203 m.daN )

.
(k) Install the L2 striker pad as follows:
1 Collect the number of shims (7) equal to the gap you recorded during adjustment.
2 Install the striker pad (6) and shims (7) at the L2 striker pad location on the left thrust reverser door with the two bolts (8).
a Tighten the bolts (8) by hand.
b Do not torque the bolts (8) at this time.
3 Install the striker pad (6) and shims (7) at the L2 striker pad location on the right thrust reverser door with the two bolts (8).
a Tighten the bolts (8) by hand.
b Do not torque the bolts (8) at this time.
4 When you complete the adjustment of the shims (7):
a TORQUE the bolts (8) to between 20 and 18 lbf.in (0.226 and 0.203 m.daN )

.
(l) Install the L3 striker pad as follows:
1 Collect the number of shims (7) equal to the gap you recorded during adjustment.
2 Install the striker pad (6) and shims (7) at the L3 striker pad location on the left thrust reverser door with the two bolts (9).
a Tighten the bolts (9) by hand.
b Do not torque the bolts (9) at this time.
3 Install the striker pad (6) and shims (7) at the L3 striker pad location on the right thrust reverser door with the two bolts (9).
a Tighten the bolts (9) by hand.
b Do not torque the bolts (9) at this time.
4 When you complete the adjustment of the shims (7):
a TORQUE the bolts (9) to between 20 and 18 lbf.in (0.226 and 0.203 m.daN )

.
(m) Install the L4 striker pad as follows:
1 Collect the number of shims (15) equal to the gap you recorded during adjustment.
2 Install the striker pad (14) and shims (15) at the L4 striker pad location on the left thrust reverser door with the two bolts (9).
a Tighten the bolts (9) by hand.
b Do not torque the bolts (9) at this time.
3 Install the striker pad (14) and shims (15) at the L4 striker pad location on the right thrust reverser door with the two bolts (9).
a Tighten the bolts (9) by hand.
b Do not torque the bolts (9) at this time.
4 When you complete the adjustment of the shims (15):
a TORQUE the bolts (9) to between 20 and 18 lbf.in (0.226 and 0.203 m.daN )

.
(n) Install the L5 striker pad as follows:
1 Collect the number of shims (18) equal to the gap you recorded during adjustment.
2 Mix the base primer (Material No.PU4-0010) with the activator (Material No.PU4-0011) and thinner (Material No.PU4-0012) . Refer to the manufacturer's instructions.
3 Install the striker pad (17) and shims (18) at the L5 striker pad location on the left thrust reverser door with the two bolts (16).
a Wet install the fasteners with the base primer (Material No.PU4-0010) mixture.
b Tighten the bolts (16) by hand.
c Do not torque the bolts (16) at this time.
4 Install the striker pad (19) and shims (18) at the L5 striker location on the right thrust reverser door with the two bolts (16).
a Wet install the fasteners with the base primer (Material No.PU4-0010) mixture.
b Tighten the bolts (16) by hand.
c Do not torque the bolts (16) at this time.
5 When you complete the adjustment of the shims (18):
a TORQUE the bolts (16) to between 27 and 24.3 lbf.in (0.31 and 0.27 m.daN )

.
(3)

Thrust Reverser Adjustment - Removal and Installation of IFS Bumper Pads, NAI Bumpers, and Striker Pads ** ON A/C NOT FOR ALL

(a) Remove the NAI bumpers as follows:
1 Remove the two screws (10), the two washers (11), the shims (13) and the NAI bumper (12) from the left thrust reverser door.
2 Remove the two screws (10), the two washers (11), the shims (13) and the NAI bumper (12) from the right thrust reverser door.
(b) Install the NAI bumpers as follows:
1 Collect the number of shims (13) equal to the gap you recorded during adjustment.
2 Install the NAI bumper (12) and shims (13) on the left thrust reverser door with the two screws (10) and the two washers (11).
a Tighten the screws (10) by hand.
b Do not torque the screws (10) at this time.
3 Install the NAI bumper (12) and shims (13) on the right thrust reverser door with the two screws (10) and the two washers (11).
a Tighten the screws (10) by hand.
b Do not torque the screws (10) at this time.
4 When you complete the adjustment of the shims (13), on the left and right thrust reverser doors :
a TORQUE the screws (10) to between 90 and 81 lbf.in (1.02 and 0.92 m.daN )

5. Close-up
Subtask 78-30-00-410-074-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the thrust reverser cowl-doors (Ref. AMM TASK 78-36-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
1 451AL, 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
1 461AL, 462AR

Subtask 78-30-00-440-068-A ** ON A/C NOT FOR ALL

B. Reactivation of the Thrust Reverser after Ground Maintenance
(1) Do the reactivation of the thrust reverser system after ground maintenance (Ref. AMM TASK 78-30-00-440-805).

Subtask 78-30-00-410-075-A ** ON A/C NOT FOR ALL

C. Close Access
(1) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
1 437AL, 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
1 447AL, 448AR
(2) Remove the access platform(s).
(3) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 03:30:45 UTC