Removal of the Thrust Reverser Latches [PW11]

TASK 78-32-35-000-801-A
Removal of the Thrust Reverser Latches

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.

FIN: 3050KM ** ON A/C NOT FOR ALL
FIN: 3051KM ** ON A/C NOT FOR ALL
FIN: 3052KM ** ON A/C NOT FOR ALL
FIN: 3053KM ** ON A/C NOT FOR ALL
FIN: 3054KM ** ON A/C NOT FOR ALL
FIN: 3055KM ** ON A/C NOT FOR ALL

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Work Zones and Access Panels

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

B. 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 78-30-00-040-805-A	Deactivation of the Thrust Reverser System for Ground Maintenance
TASK 78-32-38-000-801-A	Removal of the Track Lock Cover
TASK 78-32-41-000-803-A	Removal of the Left Thrust Reverser Thermal Insulation Blankets
TASK 78-36-00-010-802-A	Opening of the Thrust Reverser Cowl-Doors
Thrust Reverser Latches

3. Job Set-up
Subtask 78-32-35-941-050-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 78-32-35-010-050-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)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL 448AR

Subtask 78-32-35-040-050-A ** ON A/C NOT FOR ALL

C. Deactivation of the Thrust Reverser for 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 maintenance (Ref. AMM TASK 78-30-00-040-805).

Subtask 78-32-35-010-051-A ** ON A/C NOT FOR ALL

D. Get Access
(1) Open the thrust-reverser cowl-doors (Ref. AMM TASK 78-36-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL 462AR

4. Procedure
Subtask 78-32-35-020-050-A ** ON A/C NOT FOR ALL

A. Removal of the Thrust Reverser Latches
(1) Remove the No. 1A and No. 1B latches.
(a) Remove the nut (8) and washer (7) that holds the inner fail-safe pin (1) for the No. 1A latch (3) and No. 1B latch (4).
(b) Remove the inner fail-safe pin (1) from the outer fail-safe pin (2).
(c) Remove the nut (6) and pin retention cap (5) that holds the outer fail-safe pin (2).
(d) Remove the outer fail-safe pin (2), the No. 1A latch (3) and the No. 1B latch (4) from the latch beam.
(2) Remove the No. 2 latch.
(a) Remove the blanket adjacent to the No. 2 latch (9) if necessary (Ref. AMM TASK 78-32-41-000-803).
(b) Remove the bolt (10), washers (11) and (12), and nut (13) that attach the No. 2 latch (9) to the latch beam.
(c) Remove the No. 2 latch (9).
(3) Remove the No. 3 latch.
(a) Remove the track lock cover (15) (Ref. AMM TASK 78-32-38-000-801).
(b) Remove the bolt (16), washers (20) and (21), and nut (22) that attach the No. 3 latch (17) to the latch beam.
(c) Remove the No. 3 latch (17).
(4) Remove the No. 4 latch.
(a) Remove the four bolts (23) that attach the panel (24) to the latch beam. Remove the panel (24).
(b) Remove the bolt (25), washers (27) and (28), and nut (29) that attach the No. 4 latch (26) to the latch beam.
(c) Remove the No. 4 latch (26).
(5) Remove the No. 5 latch.
(a) Remove the thermal insulation blanket adjacent to the No. 5 latch (30) if necessary (Ref. AMM TASK 78-32-41-000-803).
(b) Remove the bolt (31), washers (32) and (33), and nut (34) that attach the No. 5 latch (30) to the core cowl.
(c) Remove the No. 5 latch (30).

[Rev.10 from 2021] 2026.04.01 03:33:02 UTC