Installation of the Thrust Reverser Hydraulic Tubes [CFML]

TASK 78-31-49-400-814-A
Installation of the Thrust Reverser Hydraulic Tubes

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.

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

1. Reason for the Job

NOTE: The two upper actuators are also known as the synchronized locking feedback actuators (SLFA) (FINs 3001KM1 and 3001KM4). The right-hand lower actuator is also known as the synchronized manual locking actuator (SMLA) (FIN 3001KM2). The left-hand lower actuator is also known as the synchronized non-locking actuator (SNLA) (FIN 3001KM3).

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 0.43 and 0.36 m.daN (38.05 and 31.86 lbf.in )
No specific	Torque wrench: range to between 2.26 and 2.03 m.daN (16.67 and 14.97 lbf.ft )
No specific	Torque wrench: range to between 3.16 and 2.43 m.daN (23.30 and 17.92 lbf.ft )
No specific	Torque wrench: range to between 3.62 and 2.82 m.daN (26.70 and 20.80 lbf.ft )
No specific	Torque wrench: range to between 3.48 and 2.96 m.daN (25.66 and 21.83 lbf.ft )
No specific	Torque wrench: range to between 6.21 and 5.31 m.daN (45.80 and 39.16 lbf.ft )
No specific	Torque wrench: range to between 8.42 and 7.01 m.daN (62.09 and 51.70 lbf.ft )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CPNCL00062)	LUBRICATING OIL TURBINE ENGINE SYNT BASE

C. Work Zones and Access Panels

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

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
10	WASHER	AIPC 78-31-49-05-020
13	WASHER	AIPC 78-31-49-05-020
15	WASHER	AIPC 78-31-49-05-020
2	WASHER	AIPC 78-31-49-05-020
52	WASHER	AIPC 78-31-49-05-020
68	WASHER	AIPC 78-31-49-05-020
55	WASHER	AIPC 78-31-49-05-100
56	WASHER	AIPC 78-31-49-05-100

E. Referenced Information

REFERENCE	DESIGNATION
TASK 70-70-00-910-804-A	Electrical Standard Practices
TASK 71-13-00-010-803-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-803-A	Closing of the Fan Cowl Doors
TASK 71-51-43-400-806-A	Installation of the Thrust Reverser Actuation System Electrical Harnesses
TASK 73-29-00-740-804-A	Thrust Reverser Cycling Test (Menu Mode)
TASK 78-30-00-040-807-A	Deactivation of the Thrust Reverser System for Nacelle Maintenance (ICU)
TASK 78-30-00-440-807-A	Reactivation of the Thrust Reverser System after Nacelle Maintenance (ICU)
TASK 78-31-41-820-801-A	Synchronize the Thrust Reverser Actuators
TASK 78-31-44-400-802-A	Installation of the Sync Tubes, Sync Shafts, Flex Tube and Flex Shaft
TASK 78-36-00-010-806-A	Opening of the Thrust Reverser Cowl Doors
TASK 78-36-00-410-806-A	Closing of the Thrust Reverser Cowl Doors
Thrust Reverser Hydraulic Tubes
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
TASK 29-10-00-863-001-A	Pressurize the Green Hydraulic System with a Hydraulic Ground Power-Cart
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, ENGINE 2)
TASK 29-10-00-863-002-A	Pressurize the Yellow Hydraulic System with a Hydraulic Ground Power-Cart
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 78-31-49-941-131-A

A. Safety Precautions
(1) On the center pedestal, on ENG panel 115VU:
(a) Make sure that the ENG/MODE selector switch is in the NORM position.
(b) Make sure that the ENG/MASTER 1(2) control switch was in the OFF position not less than five minutes before you do this procedure.
(c) Make sure that the WARNING NOTICE(S) are in position to tell persons not to operate:

The ENG/MODE selector switch
The ENG/MASTER 1(2) control switch.

(2) On the ENG section of maintenance panel 50VU:
(a) Make sure that the ON legend of the FADEC GND PWR/1(2) pushbutton switch is off.
(b) Make sure that the WARNING NOTICE(S) is in position to tell persons not to energize FADEC 1(2).

Subtask 78-31-49-010-231-A

B. Get Access
(1) Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
(2) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position.

Subtask 78-31-49-040-178-A

C. Deactivation of the Thrust Reverser System

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 nacelle maintenance (Ref. AMM TASK 78-30-00-040-807).

Subtask 78-31-49-010-246-A

D. Get Access
(1) Open the thrust reverser cowl-doors (Ref. AMM TASK 78-36-00-010-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
451AL, 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
461AL, 462AR

Subtask 78-31-49-864-059-A

E. Depressurize 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 HYD/FUEL panel 40VU of the overhead panel
(b) On the ground service panel of the applicable hydraulic system.
(2) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 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, ENGINE 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).

4. Procedure
Subtask 78-31-49-420-177-A

A. Installation of the Thrust Reverser Hydraulic Tubes

WARNING: DO NOT GET HYDRAULIC FLUID ON YOUR SKIN, IN YOUR EYES OR IN YOUR MOUTH. HYDRAULIC FLUID IS POISONOUS AND CAN GO THROUGH YOUR SKIN AND INTO YOUR BODY. FLUSH HYDRAULIC FLUID FROM YOUR EYES, MOUTH OR SKIN WITH WATER. GET MEDICAL AID IF YOU GET HYDRAULIC FLUID IN YOUR EYES OR MOUTH.

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.

CAUTION: DO NOT LET HYDRAULIC FLUID FALL ON THE ENGINE. UNWANTED HYDRAULIC FLUID MUST BE REMOVED IMMEDIATELY WITH A CLEAN LINT FREE CLOTH. THE FLUID CAN CAUSE DAMAGE TO THE SURFACE PROTECTION AND TO SOME PARTS.

(1) Installation of the Thrust Reverser Right Hydraulic Tubes
(a) Move the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position immediately forward of the right lower actuator.
(b) Remove all CAP - PROTECTION and COVER - PROTECTION from openings, tubes, hoses and connectors.
(c) Lubricate the threads of the bolts (60), (62), (80), (82), (84), (86), (88), (110) and (115) with LUBRICATING OIL TURBINE ENGINE SYNT BASE (Material No.CPNCL00062) .
(d) Install the P-clamps (61), (63), (79), (81), (83), (85), (87), (111) and (116) on the hydraulic tubes (59), (64) and (74).
(e) Use the record made during the removal procedure to set the clamps in the correct locations and positions.

CAUTION: WHEN YOU INSTALL THE FLEX HOSES, USE A SECOND WRENCH TO APPLY COUNTER TORQUE TO THE ANTI ROTATION DEVICES OF THE HOSES. IF THE HOSES HAVE BENDS, MAKE SURE THAT, AFTER INSTALLATION, THE BENDS ARE IN THE VERTICAL POSITION AND THAT THERE IS NO TORSION IN THE HOSES. IF YOU DO NOT OBEY THESE INSTRUCTIONS, DAMAGE TO THE FLEX HOSES CAN OCCUR.

(f) Install the hydraulic tube (74) as follows:

NOTE: Each time triple-torque is necessary do as follows:

TORQUE the connection to the necessary torque value.
Loosen the connection and TORQUE it to the necessary torque value a second time.
TORQUE the connection to the necessary torque value a third time.

1 Install the hydraulic tube (74) from the right lower actuator (96) to the right upper actuator (70).
2 From top to bottom, attach the P-clamps (87), (85), (83), (81), and (79) to the support brackets (89), (90), (91), (92) and (93) with the bolts (88), (86), (84), (82) and (80). Tighten the bolts with your hand.
3 TRIPLE TORQUE the coupling nut (97) to between 6.21 and 5.31 m.daN (45.80 and 39.16 lbf.ft )

.
4 TRIPLE TORQUE the coupling nut (73) to between 6.21 and 5.31 m.daN (45.80 and 39.16 lbf.ft )

.
5 TORQUE the bolts (80), (82), (84), (86) and (88) to between 0.43 and 0.36 m.daN (38.05 and 31.86 lbf.in )

.
(g) Install the hydraulic tube (64) as follows:
1 Install the nut (67) and the new key AIPC 78-31-49-05-020 WASHER (68) on the hydraulic connection (66).
2 Put the hydraulic connection (66) through the opening in the support bracket (69).
3 Loosely install the new key AIPC 78-31-49-05-020 WASHER (52) and the nut (51) on the hydraulic connection (66).
4 Connect the coupling nut (72) to the right upper actuator (70).
5 Attach the P-clamp (63) to the support bracket (65) with the bolt (62). Tighten the bolt with your hand.
6 TORQUE the nuts (67) and (51) to between 3.48 and 2.96 m.daN (25.66 and 21.83 lbf.ft )

.
7 TRIPLE TORQUE the coupling nut (72) to between 6.21 and 5.31 m.daN (45.80 and 39.16 lbf.ft )

.
8 TORQUE the bolt (62) to between 0.43 and 0.36 m.daN (38.05 and 31.86 lbf.in )

.
9 Connect the pylon hose (50) to the hydraulic connection (66).
10 TRIPLE TORQUE the coupling nut of the pylon hose (50) to between 6.21 and 5.31 m.daN (45.80 and 39.16 lbf.ft )

.
(h) Install the hydraulic tube (59) as follows:
1 Install the nut (57) and, if damaged, a new key AIPC 78-31-49-05-100 WASHER (56) on the hydraulic connection (58).
2 Put the hydraulic connection (58) through the opening in the support bracket (69).
3 Loosely install the new key AIPC 78-31-49-05-100 WASHER (55) and the nut (54) on the hydraulic connection (58).
4 Connect the coupling nut (76) to the right upper actuator (70).
5 Attach three P-clamps (61), (111), and (116) to the support bracket (65), (114), and (117) with three bolts (60), (110), and (115). Tighten the bolts with your hand.

NOTE: If necessary to get access, remove the two bolts (113) and the harness support bracket (114).

6 TRIPLE TORQUE the coupling nut (76) to between 3.16 and 2.43 m.daN (23.30 and 17.92 lbf.ft )

.
7 TORQUE the nuts (57) and (54) to between 2.26 and 2.03 m.daN (16.67 and 14.97 lbf.ft )

.
8 TORQUE the three bolt (60), (110), and (115) to between 0.43 and 0.36 m.daN (38.05 and 31.86 lbf.in )

.
9 Connect the pylon hose (53) to the hydraulic connection (58).
10 TRIPLE TORQUE the coupling nut of the pylon hose (53) to between 3.62 and 2.82 m.daN (26.70 and 20.80 lbf.ft )

(2) Installation of the Thrust Reverser Left Hydraulic Tubes

NOTE: Each time triple-torque is necessary do as follows:

TORQUE the connection to the necessary torque value.
Loosen the connection and TORQUE it to the necessary torque value a second time.
TORQUE the connection to the necessary torque value a third time.

(a) Move the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position immediately forward of the left lower actuator.
(b) Remove all the CAP - PROTECTION and COVER - PROTECTION from the openings, tubes, hoses, and connectors.
(c) Lubricate the threads of the bolts (34), (36), (38), (40) and (42) with LUBRICATING OIL TURBINE ENGINE SYNT BASE (Material No.CPNCL00062) .
(d) Install the P-clamps (35), (37), (39), (41) and (43) on the hydraulic tube (22).
(e) Use the record made during the removal procedure to set the clamps in the correct locations and positions.
(f) Install the hydraulic tube (22) as follows:
1 Attach the coupling nut (46) to the left lower actuator (47) and the coupling nut (21) to the left upper actuator (24).
2 From bottom to top, attach the P-clamps (35), (37), (39), (41) and (43) to the support brackets (33), (32), (31), (30) and (29) with the bolts (34), (36), (38), (40) and (42). Tighten the bolts with your hand.
3 TRIPLE TORQUE the coupling nut (46) to between 6.21 and 5.31 m.daN (45.80 and 39.16 lbf.ft )

.
4 TRIPLE TORQUE the coupling nut (21) to between 6.21 and 5.31 m.daN (45.80 and 39.16 lbf.ft )

.
5 TORQUE the bolts (34), (36), (38), (40) and (42) to between 0.43 and 0.36 m.daN (38.05 and 31.86 lbf.in )

.
(g) Install the hydraulic tube (19) as follows:
1 Connect the coupling nut (26) to the Directional Control Unit (DCU) (4).
2 Connect the coupling nut (20) to the T-Fitting (118).
3 TRIPLE TORQUE the coupling nut (26) to between 8.42 and 7.01 m.daN (62.09 and 51.70 lbf.ft )

.
4 TRIPLE TORQUE the coupling nut (20) to between 8.42 and 7.01 m.daN (62.09 and 51.70 lbf.ft )

.
(h) Install the hydraulic tube (14) as follows:
1 Install the nut (12) and the new key AIPC 78-31-49-05-020 WASHER (13) on the hydraulic connection (11).
2 Put the hydraulic connection (11) through the opening in the support bracket (3).
3 Loosely install the new key AIPC 78-31-49-05-020 WASHER (2) and nut (1) on the hydraulic connection (11).
4 Connect the coupling nut (5) to the DCU (4).
5 Connect the coupling nut (23) to the left upper actuator (24).
6 TORQUE the nuts (1) and (12) to between 3.48 and 2.96 m.daN (25.66 and 21.83 lbf.ft )

.
7 TRIPLE TORQUE the coupling nut (5) to between 6.21 and 5.31 m.daN (45.80 and 39.16 lbf.ft )

.
8 TRIPLE TORQUE the coupling nut (23) to between 6.21 and 5.31 m.daN (45.80 and 39.16 lbf.ft )

.
9 Connect the pylon hose (18) to the hydraulic connection (11).
10 TRIPLE TORQUE the coupling nut of the pylon hose (18) to between 6.21 and 5.31 m.daN (45.80 and 39.16 lbf.ft )

.
(i) Install the hydraulic tube (7) as follows:
1 Install the nut (9) and the new key AIPC 78-31-49-05-020 WASHER (10) on the hydraulic connection (8).
2 Put the hydraulic connection (8) through the opening in the support bracket (3).
3 Loosely install the new key AIPC 78-31-49-05-020 WASHER (15) and the nut (16) on the hydraulic connection (8).
4 Connect the coupling nut (6) to the DCU (4).
5 Connect the coupling nut (25) to the left upper actuator (24).
6 TRIPLE TORQUE the coupling nut (6) to between 6.21 and 5.31 m.daN (45.80 and 39.16 lbf.ft )

.
7 TRIPLE TORQUE the coupling nut (25) to between 3.16 and 2.43 m.daN (23.30 and 17.92 lbf.ft )

.
8 TORQUE the nuts (9) and (16) to between 3.48 and 2.96 m.daN (25.66 and 21.83 lbf.ft )

.
9 Connect the pylon hose (17) to the hydraulic connection (8).
10 TRIPLE TORQUE the coupling nut of the pylon hose (17) to between 6.21 and 5.31 m.daN (45.80 and 39.16 lbf.ft )

5. Close-up
Subtask 78-31-49-410-123-A

A. Close Access
(1) Install the upper flex tube and flex shaft onto the thrust reverser (Ref. AMM TASK 78-31-44-400-802).
(2) Connect the electrical harnesses as follows (Ref. AMM TASK 70-70-00-910-804):
(a) Connect the two electrical harnesses to the DCU (4) (Ref. AMM TASK 71-51-43-400-806).
(b) Connect the two electrical harnesses attached to the proximity sensors on the upper left actuator (Ref. AMM TASK 71-51-43-400-806).
(3) Synchronize the thrust reverser actuators (Ref. AMM TASK 78-31-41-820-801).
(4) Close the thrust reverser cowl-doors (Ref. AMM TASK 78-36-00-410-806).
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
451AL, 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
461AL, 462AR

Subtask 78-31-49-863-053-A

B. Pressurize the aircraft hydraulic systems
(1) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
(a) Pressurize the reservoir of the Green hydraulic system (Ref. AMM TASK 29-14-00-614-002).
(b) Pressurize the Green hydraulic system
(Ref. AMM TASK 29-10-00-863-001).
(2) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
(a) Pressurize the reservoir of the Yellow hydraulic system (Ref. AMM TASK 29-14-00-614-002).
(b) Pressurize the Yellow hydraulic system
(Ref. AMM TASK 29-10-00-863-002).

Subtask 78-31-49-440-117-A

C. Do the reactivation of the thrust reverser system after nacelle maintenance (Ref. AMM TASK 78-30-00-440-807).

Subtask 78-31-49-870-052-A

D. Bleed the thrust reverser hydraulic system
(1) Do the thrust reverser cycling test ten times (Ref. AMM TASK 73-29-00-740-804).

Subtask 78-31-49-410-124-A

E. 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 71-13-00-410-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 03:35:25 UTC