Closing of the Thrust Reverser Halves (Alternate Procedure) [IAE]

TASK 78-32-00-410-802-A
Closing of the Thrust Reverser Halves (Alternate Procedure)

WARNING: DO THIS PROCEDURE CAREFULLY. IF YOU DO NOT, THE THRUST REVERSER HALF CAN CLOSE FAST AND CAUSE INJURY TO PERSONS BETWEEN THE THRUST REVERSER HALF AND THE ENGINE.

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE PARTS AFTER THE ENGINE SHUTDOWN. USE APPLICABLE THERMAL GLOVES. THE ENGINE PARTS CAN STAY HOT FOR ONE HOUR AFTER SHUTDOWN AND CAN BURN YOU.

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

CAUTION: BEFORE AND AFTER YOU OPEN AND CLOSE THE THRUST REVERSER, MAKE SURE THAT THE LATCH 1 INDICATOR (RED FLAG) IS: - IN THE CORRECT POSITION - NOT CAUGHT BETWEEN THE TWO HALVES. IF YOU DO NOT OBEY THIS INSTRUCTION, DAMAGE TO THE EQUIPMENT CAN OCCUR.

CAUTION: FIRST CLOSE ONE HALF OF THE REVERSER AND MAKE SURE THAT THERE IS NO CHAFING BETWEEN THE LOWER BUMPER OF THE REVERSER HALF AND THE ENGINE HARNESS.

ZONE: 400
FIN: 1000EM1 ** ON A/C NOT FOR ALL
FIN: 1000EM2 ** ON A/C NOT FOR ALL

1. Reason for the Job
This task provides steps procedure on how to close the thrust reverser halves if the Opening Actuator is defective.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific	AR	WARNING NOTICE(S)
No specific	1	WRENCH - STANDARD
IAE1N20002	1	SLING-FAN THRUST REVERSER

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.V10-041)	petrolatum, white

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
400	POWER PLANT, NACELLES AND PYLONS
FOR [1000EM1] (ENGINE-1)
437AL, 438AR, 451AL, 452AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR, 461AL, 462AR

D. Referenced Information

REFERENCE	DESIGNATION
TASK 71-13-00-010-010-A	Opening of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 71-13-00-410-010-A	Closing of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 78-30-00-040-012-A	Deactivation of the Thrust Reverser Hydraulic Control Unit (HCU) for Ground Maintenance
TASK 78-30-00-440-012-A	Re-activation of the Thrust Reverser Hydraulic Control Unit (HCU) after Ground Maintenance
TASK 78-31-00-710-041-A	Operational Test of the Thrust Reverser System with the CFDS
TASK 78-31-00-710-041-A-02	Operational test of the Thrust Reverser without the CFDS and Engine Running
TASK 78-32-00-010-010-A	Opening of the Thrust Reverser Halves
TASK 78-32-70-400-010-A	Installation of the Thrust Recovery Nozzle
TASK 78-32-80-400-010-A	Installation of the Thrust Reverser Pressure Relief Door (452DR, 462DR)
Opening of the Thrust Reverser Half with a Sling
Bifurcation Panel
Thrust-Reverser Half Hold-Open-Rods - Stowed
Thrust Reverser Half Hold-Open Rods - Deployed
Thrust Reverser Half Latches
Thrust Reverser Auxiliary Latch Assembly
Thrust Reverser Half Latch Access

3. Job Set-up
Subtask 78-32-00-860-062-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) On the center pedestal, on ENG panel 115VU, make sure that a WARNING NOTICE(S) is in position to tell persons not to start the engine.
(2) On the overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off. Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize FADEC 1(2).
(3) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position.

Subtask 78-32-00-010-134-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Make sure that the thrust reverser doors are open (Ref. AMM TASK 78-32-00-010-010):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR

Subtask 78-32-00-040-092-A ** ON A/C NOT FOR ALL

C. Make sure that the thrust reverser Hydraulic Control Unit (HCU) is deactivated (Ref. AMM TASK 78-30-00-040-012).

Subtask 78-32-00-480-062-A ** ON A/C NOT FOR ALL

D. Attachment of the Thrust Reverser Sling

Opening of the Thrust Reverser Half with a Sling ** ON A/C NOT FOR ALL

(1) Carefully remove the upper strap from the IAE1N20002 SLING-FAN THRUST REVERSER at the shackle.
(2) Attach the thrust reverser sling (3) to the lower track fitting hoist points.
(3) Attach the thrust reverser IAE1N20002 SLING-FAN THRUST REVERSER to an applicable lift.

Subtask 78-32-00-640-052-A ** ON A/C NOT FOR ALL

E. Lubricate the bifurcation panel fireseal

Bifurcation Panel ** ON A/C NOT FOR ALL

SBE 79-0087 and SBE 79-0088

(1) Apply V10-041petrolatum, white liberally to the bifurcation panel fireseal.
(2) Wipe clean the seal land areas of the TRU halves and make sure that there are no burrs. If there are burrs, remove by hand-dressing.

Subtask 78-32-00-081-052-A ** ON A/C NOT FOR ALL

F. Disengage the Thrust-Reverser Half Hold-Open-Rods

Thrust-Reverser Half Hold-Open-Rods - Stowed ** ON A/C NOT FOR ALL

CAUTION: MAKE SURE THAT THE THRUST REVERSER HALF AREA IS CLEAR OF TOOLS AND EQUIPMENT BEFORE YOU CLOSE THE DOOR. FAILURE TO DO SO CAN CAUSE DAMAGE TO THE THRUST REVERSER HALF AND TO THE ENGINE.

(1) Carefully raise the thrust reverser sling (3) to remove the load from the hold-open rods (37) and (43).

Opening of the Thrust Reverser Half with a Sling ** ON A/C NOT FOR ALL

(2) Let the hold-open rods (37) and (43) disengage from the hold-open rod-fittings (38) and (39).
(3) Put the forward hold-open rod (37) in the clip assembly (53) and close the latch.
(4) Push the lock arm (42) on the aft hold-open rod (43) and retract the hold-open rod (43).

Thrust-Reverser Half Hold-Open-Rods - Stowed ** ON A/C NOT FOR ALL

(5) Release the lock arm (42) to hold the hold-open rod (43) in the fully retracted position.
(6) Put the aft hold-open rod (43) in the clip assembly (54) and close the latch.

Thrust Reverser Half Hold-Open Rods - Deployed ** ON A/C NOT FOR ALL

4. Procedure
Subtask 78-32-00-410-126-A ** ON A/C NOT FOR ALL

A. Closing of the Thrust Reverser Half

Opening of the Thrust Reverser Half with a Sling ** ON A/C NOT FOR ALL

CAUTION: MAKE SURE THE FRONT LATCH IS IN THE LOCKED POSITION WHEN YOU CLOSE THE LEFT THRUST REVERSER HALF 451AL (461AL).

(1) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR
(3) Close the thrust reverser half with precaution:

Thrust Reverser Half Latches ** ON A/C NOT FOR ALL

CAUTION: MAKE SURE THE FRONT LATCH IS IN THE LOCKED POSITION WHEN YOU CLOSE THE LEFT THRUST REVERSER HALF 451AL (461AL).

(a) Lower the thrust reverser sling (3) slowly and let the thrust reverser half (24) close.

Subtask 78-32-00-080-059-A ** ON A/C NOT FOR ALL

B. Removal of the Thrust Reverser Sling
(1) Remove the thrust reverser sling (3) from the lower track fitting hoist points.

Opening of the Thrust Reverser Half with a Sling ** ON A/C NOT FOR ALL

(2) Remove the thrust reverser sling from the applicable lift.

Subtask 78-32-00-820-054-A ** ON A/C NOT FOR ALL

C. Adjustment of the Auxiliary Latch Assembly to its Minimum Length

Thrust Reverser Auxiliary Latch Assembly ** ON A/C NOT FOR ALL

Thrust Reverser Half Latch Access ** ON A/C NOT FOR ALL

CAUTION: DO NOT TURN THE BODY OF THE AUXILIARY LATCH ASSEMBLY TO MAKE IT SHORTER THAN ITS MINIMUM LENGTH. THE AUXILIARY LATCH ASSEMBLY CAN BE DAMAGED IF YOU TRY TO DECREASE ITS MINIMUM LENGTH.

(1) Remove the auxiliary latch assembly (2) from the retention clip (5).
(2) Turn the body of the auxiliary latch assembly (2) around the end fitting which is attached to the thrust reverser half. Turn it until the end fitting touches the stop in the body.
(3) Hold the body so that it does not move and turn the other end fitting. Turn the end fitting until it touches the stop in the body.

NOTE: When the two end fittings touch the stops this is the minimum length of the auxiliary latch assembly.

Subtask 78-32-00-480-064-A ** ON A/C NOT FOR ALL

D. Engage the auxiliary latch assembly

Thrust Reverser Auxiliary Latch Assembly ** ON A/C NOT FOR ALL

Thrust Reverser Half Latch Access ** ON A/C NOT FOR ALL

(1) Hold the end fitting (which is not attached to the thrust reverser half) of the auxiliary latch assembly (2) so that it does not move.
(2) Turn the body of the auxiliary latch assembly (2) to make it longer. Increase its length until the end fitting can be attached to the hook (4) on the other thrust reverser half. Make sure that an equal amount of thread shows on each side of the body before you do step (3).
(3) Engage the auxiliary latch assembly (2) in the hook (4) on the other thrust reverser half.

Subtask 78-32-00-480-063-A ** ON A/C NOT FOR ALL

E. Engage the front latch open indicator

Thrust Reverser Half Latches ** ON A/C NOT FOR ALL

Thrust Reverser Auxiliary Latch Assembly ** ON A/C NOT FOR ALL

CAUTION: MAKE SURE THAT YOU POSITION THE FRONT LATCH CORRECTLY AGAINST THE FRONT LATCH OPEN INDICATOR WHILE YOU PULL THE THRUST REVERSER HALVES TOGETHER WITH THE AUXILIARY LATCH ASSEMBLY. IF YOU DO NOT DO THIS THE FRONT LATCH CAN GET CAUGHT BETWEEN THE THRUST REVERSER HALVES AND THE AUXILIARY LATCH ASSEMBLY AND THE HOOK CAN GET DAMAGED.

CAUTION: DO NOT TURN THE BODY OF THE AUXILIARY LATCH ASSEMBLY TO MAKE IT SHORTER THAN ITS MINIMUM LENGTH. STOP TURNING THE BODY WHEN EITHER END FITTING TOUCHES THE STOP IN THE BODY. THE AUXILIARY LATCH ASSEMBLY CAN BE DAMAGED IF YOU TRY TO DECREASE ITS MINIMUM LENGTH.

(1) Push the front latch open indicator (16) to the recessed position and hold it in this position.
(2) Turn the body of the auxiliary latch assembly (2) with a WRENCH - STANDARD to pull the thrust reverser halves closer together.

Subtask 78-32-00-410-127-A ** ON A/C NOT FOR ALL

F. Closing the Thrust Reverser Latches

Thrust Reverser Half Latches ** ON A/C NOT FOR ALL

(1) Push the latch open indicators (15) to the recessed position.
(2) Engage and close the V-groove latch (latch No. 1) (7).
(3) Engage and close the aft bifurcation latch (latch No. 4) (6).
(4) Engage and close the thrust reverser translating sleeve double latches (14).
(5) Engage and close the forward bifurcation latch (latch No. 2) (1).
(6) Engage and close the middle bifurcation latch (latch No. 3) (13).

Subtask 78-32-00-080-060-A ** ON A/C NOT FOR ALL

G. Put the auxiliary latch assembly back into the storage

Thrust Reverser Auxiliary Latch Assembly ** ON A/C NOT FOR ALL

Thrust Reverser Half Latch Access ** ON A/C NOT FOR ALL

CAUTION: IF THE AUXILIARY LATCH ASSEMBLY IS NOT PROPERLY SECURED ONTO ITS RETENTION CLIP, THE THREADED END FITTING OF THE AUXILIARY LATCH ASSEMBLY MAY START ROTATING DURING FLIGHT DUE TO VIBRATIONS AND MAY GET LOST.

CAUTION: YOU MUST ADJUST THE AUXILIARY LATCH ASSEMBLY TO ITS MINIMUM LENGTH BEFORE YOU PUT IT IN TO THE RETENTION CLIP. IF YOU DO NOT DO THIS THE AUXILIARY LATCH ASSEMBLY CAN MOVE OUT OF ITS POSITION.

(1) Turn the body of the auxiliary latch assembly (2) to make it longer. Increase the length of the auxiliary latch assembly (2) until the end fitting disengages from the hook (4) on the other thrust reverser half.
(2) Turn the body of the auxiliary latch assembly (2) around the end fitting which is attached to the thrust reverser half. Turn it until the end fitting touches the stop in the body.
(3) Hold the body so that it does not move and turn the other end fitting. Turn the end fitting until it touches the stop in the body.

NOTE: When both end fittings touch the stops, this is the minimum length of the auxiliary latch assembly.

(4) Put the auxiliary latch assembly (2) into the retention clip (5).

5. Close-up
Subtask 78-32-00-410-128-A ** ON A/C NOT FOR ALL

A. Closing of the Thrust Reverser Pressure Relief Door 452DR(462DR) (3) and the Thrust Recovery Nozzle (55) (Ref. AMM TASK 78-32-80-400-010) and (Ref. AMM TASK 78-32-70-400-010).

Subtask 78-32-00-440-086-A ** ON A/C NOT FOR ALL

B. Activation of the Thrust Reverser Hydraulic Control Unit (HCU) (Ref. AMM TASK 78-30-00-440-012).

Subtask 78-32-00-410-129-A ** ON A/C NOT FOR ALL

C. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the fan cowls (Ref. AMM TASK 71-13-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).

Subtask 78-32-00-710-059-A ** ON A/C NOT FOR ALL

D. Operational Test
(1) Do an operational test of the thrust reverser system (Ref. AMM TASK 78-31-00-710-041).

NOTE: As an alternative procedure, you can do the operational test without the CFDS (Ref. AMM TASK 78-31-00-710-041).

[Rev.10 from 2021] 2026.04.01 03:27:47 UTC