Installation of the Thrust Reverser Latches [PW11]

TASK 78-32-35-400-801-A
Installation 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.

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

ZONE: 400
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. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	SCRAPER - NON METALLIC
No specific	Torque wrench: range to between 50 and 45 lbf.in (0.57 and 0.51 m.daN )
No specific	Torque wrench: range to between 70 and 60 lbf.in (0.79 and 0.68 m.daN )
No specific	Torque wrench: range to between 200 and 175 lbf.in (2.26 and 1.98 m.daN )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.PU1-0001)	cloth
(Material No.PU2-0001)	alcohol, isopropyl
(Material No.PU3-0005)	PR-2001 rapid cure fuel tank sealant
(Material No.PU3-0005A)	sealant
(Material No.PU3-0005B)	sealant
(Material No.PU5-0004)	release agent
(Material No.PU5-0004A)	release agent
(Material No.PU5-0004B)	release agent

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 78-32-35-820-801-A	Adjustment of the Thrust Reverser Latches
TASK 78-32-38-400-801-A	Installation of the Track Lock Cover
TASK 78-32-41-400-803-A	Installation of the Left 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 Latches

3. Job Set-up
Subtask 78-32-35-941-051-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) Make sure that you did the procedure to prevent engine motoring
(Ref. AMM TASK 71-00-00-860-833).

Subtask 78-32-35-010-052-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL, 438AR.
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR.

Subtask 78-32-35-040-051-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) Make sure that you did the deactivation of the thrust reverser system for ground maintenance (Ref. AMM TASK 78-30-00-040-805).

Subtask 78-32-35-010-053-A ** ON A/C NOT FOR ALL

D. Get Access
(1) Make sure that the thrust-reverser cowl-door are open (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

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

Subtask 78-32-35-420-050-A ** ON A/C NOT FOR ALL

A. Installation of the Thrust Reverser Latches
(1) Install the No. 1A and No. 1B latches on the left thrust reverser.
(a) Attach the No. 1A latch (3) and No. 1B latch (4) on the latch beam with the outer fail-safe pin (2).
(b) Make sure that you put the outer fail-safe pin (2) into the latch beam from the forward side.
(c) Attach the outer fail-safe pin (2) with the pin retention cap (5) and the nut (6).
(d) TORQUE the nut (6) to between 200 and 175 lbf.in (2.26 and 1.98 m.daN )

.
(e) Put the inner fail-safe pin (1) in the outer fail-safe pin (2).
(f) Attach the inner fail-safe pin (1) with the washer (7) and the nut (8).
(g) TORQUE the nut (8) to between 70 and 60 lbf.in (0.79 and 0.68 m.daN )

.
(2) Install the No. 2 latch on the left thrust reverser.
(a) Attach the No. 2 latch (9) on the latch beam with the bolt (10), the washers (11) and (12) and the nut (13).
(b) Make sure that you put the bolt (10) into the forward hole of the latch beam.
(c) Make sure that the washer (11) is adjacent to the head of the bolt (10) and the washer (12) is adjacent to the nut (13).
(d) TORQUE the nut (13) to between 200 and 175 lbf.in (2.26 and 1.98 m.daN )

.
(e) Install the thermal insulation blanket adjacent to the No. 2 latch (9) if necessary (Ref. AMM TASK 78-32-41-400-803).
(3) Install the No. 3 latch on the left thrust reverser.
(a) Attach the No. 3 latch (17) to the latch beam with the bolt (16), the washers (20) and (21), and the nut (22).
(b) Make sure that you put the bolt (16) into the aft hole of the latch beam.
(c) Make sure that the washer (20) is adjacent to the head of the bolt (16) and the washer (21) is adjacent to the nut (22).
(d) TORQUE the nut (22) to between 200 and 175 lbf.in (2.26 and 1.98 m.daN )

.
(4) Install the track lock cover (Ref. AMM TASK 78-32-38-400-801).
(5) Install the No. 4 latch on the left thrust reverser.
(a) Attach the No. 4 latch (26) to the latch beam with the bolt (25), the washers (27) and (28) and the nut (29).
(b) Make sure that you put the bolt (25) into the forward hole of the latch beam.
(c) Make sure that the washer (27) is adjacent to the head of the bolt (25) and the washer (28) is adjacent to the nut (29).
(d) TORQUE the nut (29) to between 200 and 175 lbf.in (2.26 and 1.98 m.daN )

.
(e) Install the panel (24) to the latch beam.
1 Clean the mating surfaces with a clean cloth (Material No.PU1-0001) and the PU2-0001alcohol, isopropyl.
2 Remove the PU2-0001alcohol, isopropyl with a clean cloth (Material No.PU1-0001) before it dries.

CAUTION: MAKE SURE THAT THE RELEASE AGENT DOES NOT GET ON OTHER AREAS OF THE THRUST REVERSER DOOR. APPLY THE RELEASE AGENT AWAY FROM THE DOOR OR PUT MASKING TAPE ON THE ADJACENT AREAS. IF YOU DO NOT OBEY THESE INSTRUCTIONS, DAMAGE TO THE OTHER SURFACES CAN OCCUR.

3 Apply two layers of the release agent (Material No.PU5-0004) or alternate release agent (Material No.PU5-0004A) or alternate release agent (Material No.PU5-0004B) to the mating surfaces of the panel (24).
4 Let the release agent (Material No.PU5-0004) or alternate fully dry. Refer to the instructions of the manufacturer.
5 Examine sealant on the latch beam. If sealant is damaged or missing, do the following:
a Remove sealant from the latch beam with the SCRAPER - NON METALLIC.
b Clean the mating surfaces of the latch beam with a clean cloth (Material No.PU1-0001) and the PU2-0001alcohol, isopropyl.
c Remove the PU2-0001alcohol, isopropyl with a clean cloth (Material No.PU1-0001) before it dries.
6 Install the panel (24) to the latch beam with the four bolts (23).
7 TORQUE the bolts (23) to between 50 and 45 lbf.in (0.57 and 0.51 m.daN )

.
8 If sealant was damaged or missing, apply the PR-2001 rapid cure fuel tank sealant (Material No.PU3-0005) or alternate sealant (Material No.PU3-0005A) or alternate sealant (Material No.PU3-0005B) in the spaces between the panel (24) and latch beam.
9 Remove the unwanted PR-2001 rapid cure fuel tank sealant (Material No.PU3-0005) or alternate with a clean cloth (Material No.PU1-0001) .
10 Let the PR-2001 rapid cure fuel tank sealant (Material No.PU3-0005) or alternate fully dry. Refer to the instructions of the manufacturer.
(6) Install the No. 5 latch on the left thrust reverser.
(a) Attach the No. 5 latch (30) on the core cowl with the bolt (31), the washers (32) and (33), and the nut (34).
(b) Make sure that you put the bolt (31) into the aft hole of the core cowl.
(c) Make sure that the washer (32) is adjacent to the head of the bolt (31).
(d) Make sure that the washer (33) is adjacent to the nut (34).
(e) TORQUE the nut (34) to between 200 and 175 lbf.in (2.26 and 1.98 m.daN )

.
(f) Install the thermal insulation blanket adjacent to the No. 5 latch as necessary (Ref. AMM TASK 78-32-41-400-803).
(7) Adjust the latches (Ref. AMM TASK 78-32-35-820-801).

5. Close-up
Subtask 78-32-35-410-050-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-door (Ref. AMM TASK 78-36-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL, 452AR.
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL, 462AR.

Subtask 78-32-35-440-050-A ** ON A/C NOT FOR ALL

B. Do the reactivation of the thrust reverser system after ground maintenance (Ref. AMM TASK 78-30-00-440-805).

Subtask 78-32-35-410-051-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)
437AL, 438AR.
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR.
(2) Remove the WARNING NOTICE(S).

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