Installation of the TRAS Hydraulic Tubes and Hoses [PW11]

TASK 78-31-50-400-801-A
Installation of the TRAS Hydraulic Tubes and Hoses

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.

WARNING: YOU MUST NOT GET HYDRAULIC FLUID ON YOUR SKIN, IN YOUR EYES OR IN YOUR MOUTH. THE HYDRAULIC FLUID IS POISONOUS AND CAN BE ABSORBED INTO YOUR BODY. IF YOU ACCIDENTALLY GET HYDRAULIC FLUID IN YOUR EYES, MOUTH OR ON YOUR SKIN, FLUSH WITH WATER AND GET MEDICAL AID.

ZONE: 400

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	ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific	AR	CAP - PROTECTION
No specific	AR	COVER - PROTECTION
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 27 and 24 lbf.in (0.31 and 0.27 m.daN )
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 190 and 170 lbf.in (2.15 and 1.92 m.daN )
No specific	Torque wrench: range to between 204 and 177 lbf.in (2.31 and 2.00 m.daN )
No specific	Torque wrench: range to between 245 and 215 lbf.in (2.77 and 2.43 m.daN )
No specific	Torque wrench: range to between 283 and 257 lbf.in (3.20 and 2.90 m.daN )
No specific	Torque wrench: range to between 735 and 664 lbf.in (8.31 and 7.50 m.daN )
No specific	Torque wrench: range to between 945 and 855 lbf.in (10.68 and 9.66 m.daN )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.PU1-0001)	lint-free cotton cloth
(Material No.PU2-0001)	alcohol, isopropyl
(Material No.PU4-0002)	epoxy primer, fluid resistant
(Material No.PU4-0002C)	base primer
(Material No.PU4-0002D)	base primer
(Material No.PU4-0002E)	base primer
(Material No.PU4-0004A)	curing solution, epoxy primer
(Material No.PU4-0005)	thinner
(Material No.PU4-0007)	converter
(Material No.PU4-0008)	thinner
(Material No.PU4-0009)	curing solution
(Material No.PU6-0003)	lubricant

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 78-31-00-710-805-A	Operational Test of Thrust Reverser with MCDU
TASK 78-31-00-710-805-A-01	Thrust Reverser Cycling Test (Engine Running)
TASK 78-32-00-860-802-A	Manual Extension of the Thrust-Reverser Translating Sleeves
TASK 78-32-38-400-801-A	Installation of the Track Lock Cover
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
TRAS Hydraulic Tubes and Hoses
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)
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)

3. Job Set-up
Subtask 78-31-50-941-051-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 78-31-50-010-051-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 78-31-50-864-051-A ** ON A/C NOT FOR ALL

C. Depressurization of the Aircraft Hydraulic Systems
(1) Make sure that the WARNING NOTICE(S) is in position to tell persons not to pressurize the applicable system:
(a) On the overhead panel, on HYD/FUEL panel 40VU
(b) On the ground service panel of the applicable hydraulic system.
(2) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
(a) Make sure that the Green hydraulic system is depressurized (Ref. AMM TASK 29-10-00-864-001).
(b) Make sure that the reservoir of the Green hydraulic system is depressurized (Ref. AMM TASK 29-14-00-614-001).
(3) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
(a) Make sure that the Yellow hydraulic system is depressurized (Ref. AMM TASK 29-10-00-864-002).
(b) Make sure that the reservoir of the Yellow hydraulic system is depressurized (Ref. AMM TASK 29-14-00-614-001).

Subtask 78-31-50-040-051-A ** ON A/C NOT FOR ALL

D. Deactivation of the Thrust Reverser System 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 78-31-50-010-055-A ** ON A/C NOT FOR ALL

E. Get Access
(1) Make sure that the thrust reverser cowl-doors 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

Subtask 78-31-50-010-053-A ** ON A/C NOT FOR ALL

F. Get Access

CAUTION: DO NOT EXTEND THE THRUST REVERSER TRANSLATING SLEEVE MORE THAN 3.93 IN. (100 MM) WHEN THE THRUST REVERSER DOOR ON THE INBOARD SIDE IS OPEN. THE TRANSLATING SLEEVE CAN HIT THE SLATS AND CAUSE DAMAGE TO THE COMPONENTS.

(1) Make sure that the thrust reverser cowl-doors are open to the first notch or sufficient to get access to the track lock cover and track lock (Ref. AMM TASK 78-32-00-860-802).
(2) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position.

4. Procedure

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

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

Subtask 78-31-50-420-050-A ** ON A/C NOT FOR ALL

A. Installation of the TRAS Hydraulic Lines

NOTE: The following procedures are for the installation of the left thrust-reverser TRAS hydraulic-tubes and hoses. Right thrust-reverser TRAS hydraulic-tubes and hoses are opposite.

NOTE: You can use base primer (Material No.PU4-0002C) or base primer (Material No.PU4-0002D) with curing solution (Material No.PU4-0009) or base primer (Material No.PU4-0002E) with converter (Material No.PU4-0007) as an alternative to PU4-0002epoxy primer, fluid resistant.

(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) Installation of the track-lock return tube (28), track-lock control tube (29) and track-lock return-tube (30):
(a) Put the track-lock return tube (28), the track-lock control tube (29) and the track-lock return tube (30) through the latch beam.
(b) Put the grommet (31) on the track-lock return tube (28), the track-lock control tube (29) and the track-lock return tube (30).
(c) Attach the track-lock return tube (28), the track-lock control tube (29) and the track-lock return tube (30) to the latch beam with the grommet (31).
(d) Remove the COVER - PROTECTION from the track-lock return tube (28), the track-lock control tube (29) and the track-lock return tube (30).
(e) Apply thin layer of lubricant (Material No.PU6-0003) to the threads of the track-lock return tube (28), the track-lock control tube (29) and the track-lock return-tube (30) fittings.
(f) Connect the track-lock return tube (28), track-lock control tube (29) and track-lock return tube (30) to the track locking unit.
1 Do not torque the tube fittings at this time.
(3) Installation of the track-lock return tube (21), track-lock control tube (22) and track-lock return tube (23):
(a) Put the track-lock return tube (21), track-lock control tube (22) and track-lock return tube (23) through the outboard aft bulkhead of the torque box.
(b) Put the six clamps on the track-lock return tube (21), track-lock control tube (22) and track-lock return tube (23).
(c) Mix the PU4-0002epoxy primer, fluid resistant, PU4-0004Acuring solution, epoxy primer and thinner (Material No.PU4-0005) . Refer to the instructions of the manufacturer.

NOTE: You can use thinner (Material No.PU4-0008) as an alternative to thinner (Material No.PU4-0005) .

(d) Wet install the bolts (25) with the PU4-0002epoxy primer, fluid resistant mixture.
(e) Attach the track-lock return tube (21), track-lock control tube (22), track-lock return tube (23) and the six clamps (27) to the latch beam brackets. Use the six bolts (25) and the six washers (26).

NOTE: Do not torque the bolts (25) at this time.

(f) Remove the unwanted PU4-0002epoxy primer, fluid resistant mixture with a clean lint-free cotton cloth (Material No.PU1-0001) and PU2-0001alcohol, isopropyl. Remove the PU2-0001alcohol, isopropyl with a clean lint-free cotton cloth (Material No.PU1-0001) before PU2-0001alcohol, isopropyl becomes dry.
(g) Put the grommet (24) on the track-lock return tube (21), track-lock control tube (22) and track-lock return tube (23).
(h) Attach the track-lock return tube (21), track-lock control tube (22) and track-lock return tube (23) to the outboard aft bulkhead of the torque box with the grommet (24).
(i) Remove the CAP - PROTECTION from the track-lock return tube (21), track-lock control tube (22) and track-lock return tube (23).
(j) Apply thin layer of lubricant (Material No.PU6-0003) to the threads of the track-lock return tube (21), track lock control tube (22) and track-lock return-tube (23) fittings.
(k) Connect the track-lock return tube (28) to the track-lock return tube (21).

NOTE: Do not torque the track-lock return tube (28) fitting at this time.

(l) Connect the track-lock control tube (22) to the track-lock control tube (29).

NOTE: Do not torque the track-lock return tube (28) fitting at this time.

(m) Connect the track-lock return tube (23) to the track-lock return tube (30).

NOTE: Do not torque the track-lock control tube (22) fitting at this time.

(n) Connect the track-lock return tube (21) and the track-lock control tube (22) to the track lock valve.

NOTE: Do not torque the track-lock return tube (21) and the track-lock control-tube (22) fittings at this time.

(4) Installation of the track-lock return tube (17).
(a) Wet install the bolts (18) with the PU4-0002epoxy primer, fluid resistant mixture.
(b) Put the clamp (20) on the track-lock return tube (17).
(c) Attach the track-lock return tube (17) and the clamp (20) to the harness support electrical-bracket. Use the bolt (18) and the washer (19).

NOTE: Do not torque the bolt (18) at this time.

(d) Remove the unwanted PU4-0002epoxy primer, fluid resistant mixture with a clean lint-free cotton cloth (Material No.PU1-0001) and PU2-0001alcohol, isopropyl. Remove the isopropyl alcohol with a clean lint-free cotton cloth (Material No.PU1-0001) before PU2-0001alcohol, isopropyl becomes dry.
(e) Remove the CAP - PROTECTION from the track-lock return tube (17) and the locking actuator.
(f) Apply a thin layer of lubricant (Material No.PU6-0003) to the threads of the track-lock return-tube (17) fitting.
(g) Connect the track-lock return tube (23) to the track-lock return tube (17).

NOTE: Do not torque the track-lock return tube (23) fitting at this time.

(h) Connect the track-lock return tube (17) to the locking actuator.

NOTE: Do not torque the track-lock return tube (17) fitting at this time.

(5) Installation of the track-lock valve supply-tube (16).
(a) Apply a thin layer of lubricant (Material No.PU6-0003) to the threads of the track-lock-valve supply-tube (16) fittings.
(b) Connect the track-lock valve supply-tube (16) to the locking actuator and the track lock valve.

NOTE: Do not torque the track-lock-valve supply-tube (16) fittings at this time.

(6) Installation of the stow tube (11) and the return tube (12).
(a) Put the ten clamps (15) on the stow tube (11) and the return tube (12).
(b) Attach the stow tube (11), the return tube (12) and the ten clamps (15) to the torque box gussets. Use the five bolts (13) and the five washers (14).

NOTE: Do not torque the bolts (13) at this time.

(c) Remove the CAP - PROTECTION from the stow tube (11), return tube (12), locking actuator and feedback locking actuator.
(d) Apply thin layer of lubricant (Material No.PU6-0003) to the threads of the stow tube (11) and the return tube (12) fittings.
(e) Connect the stow tube (11) and the return tube (12) to the feedback locking actuator and the locking actuator.

NOTE: Do not torque the stow tube (11) and the return tube (12) fittings at this time.

(7) Adjust the tubes (11), (12), (16), (17), (21), (22), (23), (28), (29) and (30) to keep the preload to a minimum.
(a) Make sure that there are no kinks in the tubes (11), (12), (16), (17), (21), (22), (23), (28), (29) and (30).
(8) Tighten the tube fittings as follows:
(a) TORQUE the track-lock return-tube (30) fitting on the track locking unit
to between 190 and 170 lbf.in (2.15 and 1.92 m.daN )

.
(b) TORQUE the track-lock control-tube (29) fitting on the track locking unit
to between 245 and 215 lbf.in (2.77 and 2.43 m.daN )

.
(c) TORQUE the track-lock return-tube (28) fittings on the track locking unit and the track-lock return tube (21) to between 190 and 170 lbf.in (2.15 and 1.92 m.daN )

.
(d) TORQUE the track-lock return tube (23) fittings on the track-lock return tube (30) and on the track-lock return tube (17) to between 190 and 170 lbf.in (2.15 and 1.92 m.daN )

.
(e) TORQUE the track-lock control tube (22) fittings on the track-lock control tube (29) and the track lock valve to between 245 and 215 lbf.in (2.77 and 2.43 m.daN )

.
(f) TORQUE the track-lock return-tube (21) fittings on the track lock valve
to between 190 and 170 lbf.in (2.15 and 1.92 m.daN )

.
(g) TORQUE the track-lock return-tube (17) fitting on the locking actuator
to between 190 and 170 lbf.in (2.15 and 1.92 m.daN )

.
(h) TORQUE the track-lock-valve supply-tube (16) fittings on the track lock valve and the locking actuator to between 245 and 215 lbf.in (2.77 and 2.43 m.daN )

.
(i) TORQUE the return tube (12) fittings on the locking actuator and the feedback locking actuator to between 190 and 170 lbf.in (2.15 and 1.92 m.daN )

.
(j) TORQUE the stow tube (11) fittings on the locking actuator and the feedback locking actuator to between 245 and 215 lbf.in (2.77 and 2.43 m.daN )

.
(9) Tighten the bolts as follows:
(a) TORQUE the bolts (13), (18) and (25) to between 35 and 31.5 lbf.in (0.40 and 0.36 m.daN )

.
(10) Install the track lock cover on the latch beam (Ref. AMM TASK 78-32-38-400-801).
(11) Install the return hose (5), deploy hose (6) and stow hose (7):
(a) Remove the plugs (8), (9) and (10) from the deploy hose (6), return hose (5) and stow hose (7).
(b) Remove the CAP - PROTECTION from the pylon interface, feedback locking actuator, return hose (5), deploy hose (6) and stow hose (7).
(c) Install the deploy hose (6), return hose (5) and stow hose (7) on the pylon.

NOTE: Do not torque the deploy hose (6), return hose (5) and stow hose (7) fittings at this time.

(d) Install the deploy hose (6), return hose (5) and stow hose (7) on the feedback locking actuator.

NOTE: Do not torque the deploy hose (6), return hose (5) and stow hose (7) fittings at this time.

(e) Adjust the deploy hose (6), return hose (5) and stow hose (7) to keep the pre-load to a minimum.
(f) Tighten the deploy hose (6), return hose (5) and stow hose (7) fittings as follows:
1 TORQUE the return hose (5) fitting at the pylon interface to between 204 and 177 lbf.in (2.31 and 2.00 m.daN )

.
2 TORQUE the deploy hose (6) fitting at the pylon interface to between 735 and 664 lbf.in (8.31 and 7.50 m.daN )

.
3 TORQUE the stow hose (7) fitting at the pylon interface to between 283 and 257 lbf.in (3.20 and 2.90 m.daN )

.
4 TORQUE the return hose (5) fitting at the feedback locking actuator to between 190 and 170 lbf.in (2.15 and 1.92 m.daN )

.
5 TORQUE the deploy hose (6) fitting at the feedback locking actuator to between 945 and 855 lbf.in (10.68 and 9.66 m.daN )

.
6 TORQUE the stow hose (7) fitting at the feedback locking actuator to between 245 and 215 lbf.in (2.77 and 2.43 m.daN )

.
(g) Put the line block (3) on the return hose (5), deploy hose (6) and stow hose (7).
(h) Put the line block (3) with the return hose (5), deploy hose (6) and stow hose (7) in the line block frame (32). Make sure that the line block (3) fits in the line block frame (32) and is in the correct position.
(i) Close the line block frame (32) and attach it to the torque box disconnect panel with the two bolts (1), the two washers (2) and the two nuts (4).
(j) TORQUE the nuts (4) to between 27 and 24 lbf.in (0.31 and 0.27 m.daN )

5. Close-up
Subtask 78-31-50-410-051-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) Manually retract the thrust reverser translating sleeves (Ref. AMM TASK 78-32-00-860-802).
(3) Close the thrust reverser cowl-doors (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 78-31-50-440-050-A ** ON A/C NOT FOR ALL

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

Subtask 78-31-50-863-050-A ** ON A/C NOT FOR ALL

C. 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 78-31-50-410-050-A ** ON A/C NOT FOR ALL

D. 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 access platform(s).
(3) Remove the WARNING NOTICE(S).

Subtask 78-31-50-710-051-A ** ON A/C NOT FOR ALL

E. 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 13:12:53 UTC