Installation of the TRAS Locking Actuator [PW11]

TASK 78-31-03-400-801-A
Installation of the TRAS Locking Actuator

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.

CAUTION: HYDRAULIC FLUID CAN CAUSE DAMAGE TO EQUIPMENT. IF HYDRAULIC FLUID FALLS ON A SURFACE, IMMEDIATELY CLEAN THE SURFACE WITH A CLEAN CLOTH.

ZONE: 400
FIN: 3040KM1 ** ON A/C NOT FOR ALL
FIN: 3041KM2 ** 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	AR	COVER - PROTECTION
No specific	1	DRIVE 0.2 IN - SQUARE
No specific	1	DRIVE 3/8 IN - SQUARE
No specific	1	OHMMETER MULTIRANGE
No specific	1	WRENCH - TORQUE
No specific	Torque wrench: range to between 35 and 31.5 lbf.in (0.40 and 0.36 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 420 and 370 lbf.in (4.75 and 4.18 m.daN )
636-3000-28GSE	1	TR ACT. PRIM. LCK PIN

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.PU1-0001)	lint-free cotton cloth
(Material No.PU2-0001)	alcohol, isopropyl
(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, 451BL, 452BR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR, 461BL, 462BR

D. Referenced Information

REFERENCE	DESIGNATION
TASK 70-30-00-918-803-A	Consumable Materials Index for the Nacelle (UTC Aerospace Systems)
TASK 71-00-00-860-832-A	Procedure to Prevent Engine Motoring and to Stop the Electrical Supply to the EEC
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 73-25-34-400-802-A	Installation of the Engine Interface Unit (EIU)
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 78-31-00-710-805-A	Operational Test of Thrust Reverser with MCDU
TASK 78-31-00-710-805-A-01	Thrust Reverser Cycling Test (Engine Running)
TASK 78-31-05-400-801-A	Installation of the Manual Drive Unit (MDU)
TASK 78-31-07-000-801-A	Removal of the Flex Shaft
TASK 78-31-07-400-801-A	Installation of the Flex Shaft
TASK 78-31-50-400-801-A	Installation of the TRAS Hydraulic Tubes and Hoses
TASK 78-31-61-400-811-A	Installation of the Left TRAS Monitoring Harness
TASK 78-31-61-400-812-A	Installation of the Right TRAS Monitoring Harness
TASK 78-32-00-860-803-A	Manual Retraction of the Thrust-Reverser Translating Sleeves
TASK 78-32-34-000-802-A	Removal of the Left Translating Sleeve Access Panels
TASK 78-32-64-000-802-A	Removal of the Right Translating Sleeve Access Panels
TRAS Locking Actuator
TRAS Locking Actuator - Locked and Unlocked Positions
Manual Drive Unit - Locked and Unlocked Positions
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
TASK 29-10-00-864-001-A	Depressurize the Green Hydraulic System
TASK 29-14-00-614-001-A	Depressurization of the Hydraulic Reservoirs
TASK 29-14-00-614-002-A	Pressurization of the Hydraulic Reservoirs through the Ground Connector
TASK 29-14-00-614-002-A-01	Pressurization of the Hydraulic Reservoirs with the Auxiliary Power Unit (APU)
TASK 78-32-34-400-802-A	Installation of the Left Translating Sleeve Access Panels
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
TASK 29-10-00-864-002-A	Depressurize the Yellow Hydraulic System
TASK 29-14-00-614-001-A	Depressurization of the Hydraulic Reservoirs
TASK 29-14-00-614-002-A	Pressurization of the Hydraulic Reservoirs through the Ground Connector
TASK 29-14-00-614-002-A-01	Pressurization of the Hydraulic Reservoirs with the Auxiliary Power Unit (APU)
TASK 78-32-64-400-802-A	Installation of the Right Translating Sleeve Access Panels

3. Job Set-up
Subtask 78-31-03-941-051-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) Make sure that you did the procedure to prevent engine motoring and to stop the electrical supply to the Electronic Engine Control (EEC)
(Ref. AMM TASK 71-00-00-860-832)

Subtask 78-31-03-010-052-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 78-31-03-630-050-A ** ON A/C NOT FOR ALL

C. Make sure that the hydraulic systems are depressurized.

WARNING: MAKE SURE YOU DEPRESSURIZED THE HYDRAULIC SYSTEM. IF YOU LOOSEN A HYDRAULIC TUBE FITTING WHEN THERE IS PRESSURE IN THE HYDRAULIC SYSTEM, YOU CAN CAUSE INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT.

(1) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
(a) Depressurize the Green hydraulic system (Ref. AMM TASK 29-10-00-864-001).
(b) Depressurize the Green hydraulic reservoir (Ref. AMM TASK 29-14-00-614-001).
(2) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
(a) Depressurize the Yellow hydraulic system (Ref. AMM TASK 29-10-00-864-002).
(b) Depressurize the Yellow hydraulic reservoir (Ref. AMM TASK 29-14-00-614-001).

Subtask 78-31-03-040-051-A ** ON A/C NOT FOR ALL

D. Deactivation of the Thrust Reverser System 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) Make sure that you did the deactivation of the thrust reverser system for ground maintenance (Ref. AMM TASK 78-30-00-040-805).

Subtask 78-31-03-010-053-A ** ON A/C NOT FOR ALL

E. Get Access to the TRAS Locking Actuator
(1) Make sure that the lower translating sleeve access panels are removed (Ref. AMM TASK 78-32-34-000-802) (Ref. AMM TASK 78-32-64-000-802).
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451BL , 452BR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461BL, 462BR.

4. Procedure

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

Subtask 78-31-03-420-050-A ** ON A/C NOT FOR ALL

A. Installation of the TRAS Locking Actuator

NOTE: These procedures are for the left TRAS locking actuator. The right side is opposite.

(1) Removal of the protection covers

CAUTION: REMOVE THE PROTECTION COVERS FROM THE OPENINGS AS NECESSARY TO PREVENT ENGINE DAMAGE.

(a) Make sure that you remove all the necessary COVER - PROTECTION to prevent damage to the engine.
(2) Extend the locking actuator (1).

CAUTION: REMOVE THE PROTECTION COVERS FROM THE ACTUATOR BEFORE YOU MANUALLY EXTEND IT. IF YOU DO NOT OBEY THIS INSTRUCTION, THE ACTUATOR CAN OPERATE INCORRECTLY AND CAUSE DAMAGE TO THE EQUIPMENT.

(a) Remove the protection covers from the locking actuator (1).
(b) Turn the locking actuator (1) manual lock drive to the unlocked position.
(c) Install the 636-3000-28GSE TR ACT. PRIM. LCK PIN in the locking actuator (1) through the manual lock drive to hold the manual lock drive in position.
(d) Extend the locking actuator

CAUTION: DO NOT APPLY A TORQUE OF MORE THAN 70 LBF-IN (0.79 m.daN) WHEN YOU ADJUST THE ACTUATOR. TOO MUCH TORQUE CAN CAUSE DAMAGE TO THE ACTUATOR.

1 Carefully extend the locking actuator (1) to the length that you recorded when you removed the locking actuator (1). Use the DRIVE 0.2 IN - SQUARE and the WRENCH - TORQUE.
(e) Install the COVER - PROTECTION back on the locking actuator (1).
(3) Put the actuator seal (16) on the locking actuator (1).
(a) Move the actuator seal (16) to the base of the locking actuator (1).
(b) Make sure that the metal plate of the seal touches the actuator seal backing plate.
(4) Put the locking actuator (1) in position on the thrust reverser.
(a) Carefully put the locking actuator (1) through the TRAS fitting.
(b) Turn the locking actuator (1) approximately 90 degrees until the locking actuator (1) rod end can fit through the cascade ring bumper.
(c) Turn the locking actuator (1) back 90 degrees when the locking actuator (1) rod end is through the cascade ring bumper.
(d) Put the locking actuator (1) in position as follows:

CAUTION: MAKE SURE THAT THE ACTUATOR ROD END ALIGNS WITH THE TRANSLATING SLEEVE ACTUATOR FITTING. DO NOT USE FORCE TO PUT THE ACTUATOR ROD END INTO POSITION. IF YOU DO NOT OBETY THIS INSTRUCTION, DAMAGE TO THE EQUIPMENT CAN OCCUR.

1 Carefully move the locking actuator (1) aft until the locking actuator (1) rod end aligns with the translating sleeve actuator fitting.
(5) Apply a thin layer of anti-seize compound (Material No.PU5-0005) or equivalent (Ref. AMM TASK 70-30-00-918-803) to the two gimbal pins (11).
(6) Have one person push the locking actuator (1) against the TRAS fitting and compress the actuator seal (16). Have the second person install the gimbal pins (11) into the TRAS fitting and locking actuator (1).
(7) Safety the gimbal pins (11) with two gimbal pin retainers (10), four bolts (8) and the four washers (9).
(8) TORQUE the bolts (8) .

CAUTION: MAKE SURE THAT YOU APPLY THE CORRECT TORQUE RANGE ON THE BOLTS. AN INCORRECT TORQUE CAN CAUSE DAMAGE TO THE ACTUATOR AND/OR CAUSE THE ACTUATOR TO OPERATE INCORRECTLY.

(a) TORQUE the bolts (8) to between 90 and 81 lbf.in (1.02 and 0.92 m.daN )

(9) Apply a thin layer of anti-seize compound (Material No.PU5-0005) or equivalent (Ref. AMM TASK 70-30-00-918-803) to the shank and threads of the bolt (2).
(10) Attach the locking actuator (1) to the translating sleeve fitting with the bolt (2) and bushing (3).
(11) TORQUE the bolt (2) to between 420 and 370 lbf.in (4.75 and 4.18 m.daN )

.
(12) Attach the grounding strap (14) to the locking actuator (1).
(a) Clean the surface where the grounding strap (14) attaches to the locking actuator (1) with a clean lint-free cotton cloth (Material No.PU1-0001) and PU2-0001alcohol, isopropyl.
(b) Remove the PU2-0001alcohol, isopropyl from the surface with a clean lint-free cotton cloth (Material No.PU1-0001) before it dries.
(c) Attach the grounding strap (14) to the locking feedback actuator (1) with the bolt (15) and washers (12) and (13).
(d) TORQUE the bolt (15) to between 35 and 31.5 lbf.in (0.40 and 0.36 m.daN )

.
(e) Measure the resistance between the grounding strap (14) lug and the lower torque box with an OHMMETER MULTIRANGE. Make sure that the resistance is 0.0100 ohms or less.
(f) If the resistance is more than 0.0100 ohms, remove the bolt (15) and washers (12) and (13) and do steps 4.A.(12)(a) thru 4.A.(12)(e) again.
(13) Remove the COVER - PROTECTION from the locking actuator (1), Manual Drive Unit (MDU), stow tube, return tube, track lock return tube and track lock valve supply tube.
(14) Connect the track lock return tube and track lock valve supply tube to the locking actuator (1) (Ref. AMM TASK 78-31-50-400-801).
(15) Connect the stow tube and the return tube to the locking actuator (1) (Ref. AMM TASK 78-31-50-400-801).
(16) If you removed the clamps and hardware on the hydraulic tubes, install the clamps and hardware back on the hydraulic tubes and torque box (Ref. AMM TASK 78-31-50-400-801).
(17) Connect the flexible drive shaft to the locking actuator (1) (Ref. AMM TASK 78-31-07-400-801).
(18) If you removed the clamps, clamp assemblies and hardware on deploy tube, install the clamps, clamp assemblies and hardware back on the deploy tube and torque box (Ref. AMM TASK 78-31-07-400-801).
(19) Attach the MDU to the locking actuator (1) (Ref. AMM TASK 78-31-05-400-801).
(20) Connect the TRAS monitoring harness to the locking actuator (1).

CAUTION: MAKE SURE THAT THE ELECTRICAL CONNECTOR IS CLEAN BEFORE YOU CONNECT IT. DIRTY ELECTRICAL CONNECTORS CAN CAUSE THRUST REVERSER PROBLEMS.

CAUTION: USE PLIERS THAT HAVE TEFLON JAWS TO TIGHTEN THE ELECTRICAL CONNECTORS. DO NOT USE PLIERS THAT HAVE METAL JAWS. METAL JAWS CAN CAUSE DAMAGE TO THE ELECTRICAL CONNECTORS.

(a) Remove the COVER - PROTECTION from TRAS monitoring harness connectors.
(b) For the left locking actuator, connect the left TRAS monitoring harnesses (4034KS-A) and (4042KS-A) to the locking actuator (1) (Ref. AMM TASK 78-31-61-400-811).
(c) For the right locking actuator, connect the right TRAS monitoring harnesses (4035KS-A) and (4043KS-A) to the locking actuator (1) (Ref. AMM TASK 78-31-61-400-812).
(21) Retraction of the translating sleeve

CAUTION: MAKE SURE THAT BOTH THE LOCKING ACTUATOR AND LOCKING FEEDBACK ACTUATOR LOCK WHEN YOU RETRACT THE TRANSLATING SLEEVE. IF ONE OR BOTH ACTUATORS DO NOT LOCK, THE ACTUATION SYSTEM IS NOT CORRECTLY SYNCHRONIZED.

(a) Manually retract the left translating sleeve (Ref. AMM TASK 78-32-00-860-803).
(22) If one or both the locking actuator (1) and locking feedback actuator do not lock when you retract the translating sleeve, do as follows:
(a) Remove the flexible drive shaft (Ref. AMM TASK 78-31-07-000-801).
(b) For the locking feedback actuator, do as follows:

CAUTION: DO NOT APPLY A TORQUE OF MORE THAN 70 LBF-IN (0.79 m.daN) WHEN YOU ADJUST THE ACTUATOR. TOO MUCH TORQUE CAN CAUSE DAMAGE TO THE ACTUATOR.

1 Retract the locking feedback actuator to the locked position. Use the DRIVE 0.2 IN - SQUARE and the WRENCH - TORQUE.
2 Remove the DRIVE 0.2 IN - SQUARE from the locking feedback actuator.
(c) For the locking actuator (1), do as follows:
1 Turn the MDU lever to the unlocked position.
2 Put the DRIVE 3/8 IN - SQUARE in the MDU square drive engagement.
3 Turn the MDU and retract the locking actuator (1) to the locked position.

NOTE: Turn the MDU on the left thrust reverser half clockwise to retract the translating sleeve. Turn the manual drive unit on the right thrust reverser half counterclockwise to retract the translating sleeve.

4 Remove the DRIVE 3/8 IN - SQUARE from the MDU.
5 Rotate the MDU lever to the locked position.
(d) Install the flexible drive shaft (Ref. AMM TASK 78-31-07-400-801).

5. Close-up
Subtask 78-31-03-410-050-A ** ON A/C NOT FOR ALL

A. Close the Access to the TRAS Locking Actuator.
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the lower translating sleeve access covers
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
(Ref. AMM TASK 78-32-34-400-802)
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
(Ref. AMM TASK 78-32-64-400-802)

Subtask 78-31-03-440-050-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 78-31-03-410-051-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 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.
(3) Remove the WARNING NOTICE(S).

Subtask 78-31-03-863-050-A ** ON A/C NOT FOR ALL

D. Pressurization of the Aircraft Hydraulic Systems
(1) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
(a) Pressurize the reservoir of the Green hydraulic system (Ref. AMM TASK 29-14-00-614-002).
(2) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
(a) Pressurize the reservoir of the Yellow hydraulic system (Ref. AMM TASK 29-14-00-614-002).

Subtask 78-31-03-710-050-A ** ON A/C NOT FOR ALL

E. Make sure that all the circuit breakers shown in the paragraph Procedure of the engine interface unit installation are closed. If they are not, close them in the recommended sequence
(Ref. AMM TASK 73-25-34-400-802)
(1) Do the operational test of the thrust reverser system with the Multipurpose Control and Display Unit (MCDU) (bleeding) (Ref. AMM TASK 78-31-00-710-805).

[Rev.10 from 2021] 2026.04.01 03:31:10 UTC