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

TASK 78-32-00-010-802-A
Opening 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.

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.

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

B. 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

C. Referenced Information

REFERENCE	DESIGNATION
TASK 71-13-00-010-010-A	Opening of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 72-38-25-200-010-A	Detailed Inspection of Bifurcation Panel Fire Seal
TASK 78-30-00-040-012-A	Deactivation of the Thrust Reverser Hydraulic Control Unit (HCU) for Ground Maintenance
TASK 78-32-51-820-010-A	Adjustment of the Thrust Reverser Half Forward Hold-Open Rod
TASK 78-32-70-000-010-A	Removal of the Thrust Recovery Nozzle
TASK 78-32-80-000-010-A	Removal of the Thrust Reverser Pressure Relief Door (452DR, 462DR)
Thrust Reverser Auxiliary Latch Assembly
Thrust Reverser Half Latch Access
Thrust Reverser Half Latches
Opening of the Thrust Reverser Half with a Sling
Thrust-Reverser Half Hold-Open-Rods - Stowed
Thrust Reverser Half Hold-Open Rods - Deployed

3. Job Set-up
Subtask 78-32-00-941-097-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) On the center pedestal, on ENG panel 115VU:
(a) Put a WARNING NOTICE(S) in position to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than five minutes before you do this procedure.
(3) On the overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).

Subtask 78-32-00-010-127-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Open the fan cowls (Ref. AMM TASK 71-13-00-010-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position.

Subtask 78-32-00-040-090-A ** ON A/C NOT FOR ALL

C. Deactivation of the Thrust Reverser

WARNING: MAKE SURE THAT THE THRUST REVERSER HYDRAULIC CONTROL UNIT (HCU) IS DEACTIVATED BEFORE YOU DO WORK ON OR AROUND THE THRUST REVERSER. IF THE HCU IS NOT DEACTIVATED, THERE IS A RISK OF UNWANTED THRUST REVERSER OPERATION WHICH CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.

(1) Deactivate the thrust reverser Hydraulic Control Unit (HCU) (Ref. AMM TASK 78-30-00-040-012).

Subtask 78-32-00-010-128-A ** ON A/C NOT FOR ALL

D. Opening of the Thrust Reverser Pressure Relief Door 452DR(462DR) (3) and the Thrust Recovery Nozzle (55) (Ref. AMM TASK 78-32-80-000-010) and (Ref. AMM TASK 78-32-70-000-010).

Subtask 78-32-00-820-052-A ** ON A/C NOT FOR ALL

E. 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 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 78-32-00-480-057-A ** ON A/C NOT FOR ALL

F. Installation of the Auxiliary Latch Assembly

Thrust Reverser Auxiliary Latch Assembly ** 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. 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) 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 the 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.
(4) Turn the body of the auxiliary latch assembly (2) with a WRENCH - STANDARD to pull the two thrust reverser halves closer together. This relieves the tension on the thrust reverser latches.

4. Procedure
Subtask 78-32-00-010-129-A ** ON A/C NOT FOR ALL

A. Opening of the Thrust Reverser Half Latches

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

CAUTION: MAKE SURE THAT THE AUXILIARY LATCH ASSEMBLY DEVICE IS ENGAGED BEFORE YOU RELEASE THE LATCHES. FAILURE TO DO SO CAN CAUSE THE LATCHES TO OPEN FAST AND CAUSE INJURY TO PERSONS.

(1) Release the middle bifurcation latch (latch No. 3) (13).
(2) Release the forward bifurcation latch (latch No. 2) (1).
(3) Release the translating sleeve double latch (14).
(4) Release the aft bifurcation latch (latch No. 4) (6).
(5) Release the V-groove latch (latch No. 1) (7).

Subtask 78-32-00-010-130-A ** ON A/C NOT FOR ALL

B. Put the auxiliary latch assembly into its storage position

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

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

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 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 the two 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).

Subtask 78-32-00-080-056-A ** ON A/C NOT FOR ALL

C. Attachment of the Thrust Reverser Sling

WARNING: DO NOT POSITION YOURSELF BETWEEN THE THRUST REVERSER HALF AND THE ENGINE UNTIL THE HOLD OPEN RODS ARE IN POSITION ON THE ENGINE.

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

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

(3) Attach the thrust reverser sling (3) to an applicable lift.

Subtask 78-32-00-480-058-A ** ON A/C NOT FOR ALL

CAUTION: BEFORE YOU OPEN AND AFTER YOU CLOSE THE THRUST REVERSER, MAKE SURE THAT:

THERE IS NO FOREIGN OBJECT
THERE IS NO DAMAGE RELATED TO A FOREIGN OBJECT

AT THE HINGE ACCESS PANEL. IF YOU DO NOT OBEY THIS INSTRUCTION, DAMAGE TO THE EQUIPMENT CAN OCCUR.

D. Opening of the Thrust Reverser Half

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

NOTE: Make sure the hinge access panel is properly seated on the upper track fairing and sufficient clearance between the hinge access panel and thrust reverser upper edge exists.

(1) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR
(3) Open the thrust reverser half to 35 deg (35.00 deg) the position.

Subtask 78-32-00-010-131-A ** ON A/C NOT FOR ALL

E. Put the hold-open rods in position to hold the thrust reverser half:

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

(1) Put the aft hold-open rod (43) in position
(a) Open the clip assembly (54) to release the hold-open rod (43).

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

(b) Push the lock arm (42) and fully extend the hold-open rod (43).

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

(c) Release the lock arm (42) and make sure that the hold-open rod (43) is locked in the fully extended position.
(d) Carefully lower the IAE1N20002 SLING-FAN THRUST REVERSER. Let the thrust reverser half close until the rod plunger (41) is engaged in the rod anchorage bracket (40).
(2) Put the forward hold-open rod (37) in position:
(a) Open the clip assembly (53) to release the hold-open rod (37).

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

(b) Hook the hold-open rod (37) in the hold-open rod fitting (38).

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

NOTE: The adjustment of the forward hold-open rod should be necessary only during initial installation of the hold-open rod, or if the adjustment has been disturbed.

(c) If the coupler does not engage satisfactorily because the rod is the incorrect length, adjust the forward hold-open rod (Ref. AMM TASK 78-32-51-820-010).
(d) Carefully lower the IAE1N20002 SLING-FAN THRUST REVERSER. Let the thrust reverser half close until the rod plunger (39) is engaged in the rod anchorage bracket (38).
(3) Make sure that the thrust reverser half is held correctly:
(a) Make sure that the hold-open rod (37) and (43) are properly engaged in the fittings (38) and (39).
(b) Make sure that the weight of the thrust reverser half is held equally by the two hold-open rods (37) and (43).
(c) If the weight of the thrust reverser half is not held equally by the two hold-open rods (37) and (43), adjust the forward hold-open rod (37) (Ref. AMM TASK 78-32-51-820-010).

Subtask 78-32-00-010-133-A ** ON A/C NOT FOR ALL

F. 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 78-32-00-210-095-A ** ON A/C NOT FOR ALL

G. Examine the disconnect panel rubber fireseal (Ref. AMM TASK 72-38-25-200-010).

NOTE: This subtask is only applicable for engines that are Post SBE 79-0087 (V2500-A1) and Post SBE 79-0088 (V2500-A5).

[Rev.10 from 2021] 2026.04.01 03:27:46 UTC