Removal of the Pressure/Suction/Case Drain/Return Piping of the Green Hydraulic System in the Engine Pylon

TASK 29-11-49-000-813-A
Removal of the Pressure/Suction/Case Drain/Return Piping of the Green Hydraulic System in the Engine Pylon

WARNING: PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU START A TASK ON OR NEAR:

THE FLIGHT CONTROLS
THE FLIGHT CONTROL SURFACES
THE LANDING GEAR AND THE RELATED DOORS
COMPONENTS THAT MOVE.

MOVEMENT OF COMPONENTS CAN KILL OR CAUSE INJURY TO PERSONS AND/OR CAN CAUSE DAMAGE TO THE EQUIPMENT.

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: 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.

WARNING: OBEY THE HYDRAULIC SAFETY PROCEDURES.

WARNING: BE CAREFUL NOT TO GET AIRCRAFT FUEL IN YOUR MOUTH OR IN YOUR EYES. IF YOU GET FUEL ON YOUR SKIN OR ON YOUR CLOTHES, FLUSH IT IMMEDIATELY WITH WATER. IF NECESSARY, GET MEDICAL HELP. AIRCRAFT FUEL IS POISONOUS.

ZONE: 410
ZONE: 470

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 3M (10 FT)- ADJUSTABLE
No specific	AR	CAP - PROTECTION
No specific	1	CONTAINER 5 L (1.32 USGAL)
No specific	AR	PLUG - BLANKING
No specific	AR	WARNING NOTICE(S)
98D27803000000	1	LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
410	ENG 1 PYLON BOX AND FORWARD FAIRING
470	ENGINE 1 AFT PYLON
195BB, 197CB
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
411AL, 413AL, 413BL, 413CL, 415BL, 437AL, 438AR, 473AL, 475AL

C. Referenced Information

REFERENCE	DESIGNATION
TASK 24-42-00-861-001-A	Energize the Ground Service Network from the External Power
TASK 26-21-41-000-001-F	Removal of the Engine Fire-Extinguisher Bottle
TASK 26-21-49-000-804-A	Removal of the Engine Fire-Extinguishing Pipes (Center and Aft Part)
TASK 27-00-00-480-002-A	Installation of the Flap/Slat Control-Lever Locking Tool (98D27803000000)
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 36-11-42-000-804-A	Removal of the Bleed-Air Precooler Exchanger
TASK 54-51-21-000-804-A	Removal of the Pylon Lateral Access-Doors
TASK 54-52-11-000-807-A	Removal of the Access Skin Panels
TASK 54-53-11-000-806-A	Removal of the Pylon-to-Wing Access Panels and Doors
TASK 54-54-00-000-804-A	Removal of the Rear Pylon Fairing (RPF)
TASK 54-57-22-000-815-A	Removal of the Rear Mount Fairing (RMF) Door
TASK 54-57-22-000-818-A	Removal of the Rear Mount Fairing (RMF) Assembly
TASK 71-13-00-010-803-A	Opening of the Fan Cowl Doors
TASK 78-30-00-040-809-A	Deactivation of the Thrust Reverser System for Ground Maintenance
Forward Pressure/Suction/Case Drain/Return Piping of the Green Hydraulic System in the Engine Pylon
Middle Pressure/Suction/Case Drain/Return Piping of the Green Hydraulic System in the Engine Pylon
Aft Pressure/Suction/Case Drain/Return Piping of the Green Hydraulic System in the Engine Pylon

3. Job Set-up
Subtask 29-11-49-861-052-A

A. Energize the ground service network
(Ref. AMM TASK 24-42-00-861-001).

Subtask 29-11-49-860-153-A

B. Aircraft Maintenance Configuration
(1) Make sure that the Green hydraulic system is depressurized
(Ref. AMM TASK 29-10-00-864-001).
(2) Depressurize the reservoir of the Green hydraulic system
(Ref. AMM TASK 29-14-00-614-001).

Subtask 29-11-49-941-123-A

C. Safety Precautions
(1) On AIR COND panel 30VU:

Make sure that the APU BLEED pushbutton switch is released (ON legend off).
Put a WARNING NOTICE(S) in position to tell persons not to operate this pushbutton switch.

(2) Open access door 197CB.
(a) Put a WARNING NOTICE(S) in position to tell persons not to pressurize the Green hydraulic system on the ground service panel.
(3) On the HYD section of panel 40VU:

Put WARNING NOTICE(S) in position to tell persons not to pressurize the Green hydraulic system.

(4) Open access door 195BB.
(a) Put a WARNING NOTICE(S) in position to tell persons not to pressurize the reservoir of the Green hydraulic system.
(5) On FLAPS panel 114VU:

Install the 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION on the flap/slat control lever (Ref. AMM TASK 27-00-00-480-002).
Put a WARNING NOTICE(S) in position on the flap/slat control lever to tell persons not to operate the flap/slat controls.

(6) On the center pedestal, on ENG panel 115VU:

Make sure that the ENG/MODE selector switch is in the NORM position.
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.
Make sure that a WARNING NOTICE(S) is in position to tell persons not to operate the ENG/MODE selector switch and the ENG/MASTER 1(2) control switch.

(7) On the ENG section of maintenance panel 50VU:

Make sure that the ON legend of the FADEC GND PWR/1(2) pushbutton switch is off.
Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize FADEC 1(2).

Subtask 29-11-49-040-085-A

D. 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 78-30-00-040-809).

Subtask 29-11-49-010-156-A

E. Get Access
(1) Remove this access panel (Ref. AMM TASK 54-53-11-000-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)

413CL

(2) Remove this access panel (Ref. AMM TASK 54-51-21-000-804):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)

415BL

(3) Remove these access skin panels (Ref. AMM TASK 54-52-11-000-807):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)

413AL, 413BL, 411AL

(4) Remove this rear pylon fairing (Ref. AMM TASK 54-54-00-000-804):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)

475AL

(5) Remove this rear mount-fairing door (Ref. AMM TASK 54-57-22-000-815):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)

473AL

(6) Remove the rear mount-fairing assembly (Ref. AMM TASK 54-57-22-000-818).
(7) Put an ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position at zones 410 and 470.

Subtask 29-11-49-010-155-A

F. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR

Subtask 29-11-49-020-134-A

G. Removal of Components
(1) Remove the fire extinguisher bottles (Ref. AMM TASK 26-21-41-000-001).
(2) Remove the engine fire-extinguishing pipe (Ref. AMM TASK 26-21-49-000-804).
(3) Remove the bleed-air precooler exchanger (Ref. AMM TASK 36-11-42-000-804).

4. Procedure
Subtask 29-11-49-020-135-B

A. Removal of the Forward Pressure/Suction/Case Drain/Return Piping of the Green Hydraulic System in the Engine Pylon

CAUTION: USE TWO WRENCHES TO REMOVE OR INSTALL THE TUBE COUPLING NUTS:

ONE WRENCH TO HOLD THE UNION, AND
ONE TO LOOSEN OR TIGHTEN THE COUPLING NUT.

THIS PREVENTS DAMAGE TO THE PARTS.

(1) Put a CONTAINER 5 L (1.32 USGAL) in position below the connections of the hydraulic lines.
(2) Removal of the hydraulic pipe (1):
(a) Removal of the clamp (8):
1 Remove the bolts (10) and the washers (9) that attach the clamp (8) to the structure.
2 Remove the clamp (8).
(b) Disconnect the hydraulic pipe (1) from the ICU connector (47).
1 Drain the hydraulic fluid into the CONTAINER 5 L (1.32 USGAL).
(c) Hold the hydraulic pipe (1) and disconnect it from the hydraulic filter (7).
(d) Remove the hydraulic pipe (1) from the pylon.
(e) Put the PLUG - BLANKING in the disconnected line ends.
(3) Removal of the hydraulic pipe (2):
(a) Remove the sealant from the heads of the bolts (43) and (123) and around the check valve (45).
(b) Disconnect the hydraulic pipe (46) from the check valve (45).
(c) Remove the bolts (43) and (123) and the washers (44).
(d) Remove the anti-rotation device (122).
(e) Remove the sealant from the mating surfaces of the anti-rotation device (122) and the pylon.
(f) Disconnect the check valve (45) from the hydraulic pipe (2).
1 Drain the hydraulic fluid of the hydraulic pipe (2) into the CONTAINER 5 L (1.32 USGAL).
2 Put the CAP - PROTECTION on the two ends of the check valve (45).
(g) Hold the hydraulic pipe (2) and disconnect it from the hydraulic filter (7).
(h) Remove the hydraulic pipe (2) from the pylon.
(i) Put the PLUG - BLANKING in the disconnected line ends.
(4) Removal of the hydraulic filter (7):
(a) Hold the hydraulic filter (7) and disconnect the hydraulic pipe (3) from it.
1 Drain the hydraulic fluid into the CONTAINER 5 L (1.32 USGAL).
(b) Remove the hydraulic filter (7) from the pylon.
(c) Put the PLUG - BLANKING in the disconnected line ends.
(5) Removal of the half clamp blocks (23) and (24):

NOTE: It is necessary to remove the half clamp blocks (23) and (24) before removal of the hydraulic pipes (3), (4), (5) and (6).

(a) Remove the nuts (14).
(b) Remove the bolts (20) and the washers (19) that attach the half clamp block (23) to the half clamp block (24).
(c) Remove the nuts (25).
(d) Hold the half clamp block (24) and remove the bolts (16) and the washers (15).
(e) Remove the half clamp block (24).
(f) Remove the nuts (25).
(g) Hold the half clamp block (23) and remove the bolts (18) and (21) and the washers (17) and (22).
(h) Remove the half clamp block (23).
(6) Removal of the hydraulic pipe (3):
(a) Disconnect the hydraulic pipe (3) from the hydraulic pipe (49).
(b) Removal of the three clamps (8):
1 Hold the hydraulic pipe (3).
2 Remove the bolts (10) and the washers (9) that attach the clamps (8) to the structure.
3 Remove the clamps (8).
(c) Remove the hydraulic pipe (3) from the pylon.
(d) Remove the bushing (26) from the hydraulic pipe (3).
(e) Put the PLUG - BLANKING in the disconnected line ends.
(7) Removal of the hydraulic pipe (6):
(a) Disconnect the hydraulic pipe (6) from the T-duct (41).
1 Drain the hydraulic fluid into the CONTAINER 5 L (1.32 USGAL).
(b) Disconnect the hydraulic pipe (6) from the hydraulic pipe (50).
(c) Removal of the two clamps (8):
1 Remove the bolts (10) and the washers (9) that attach the clamps (8) to the structure.
2 Remove the clamps (8).
(d) Removal of the clamp blocks (30):
1 Hold the hydraulic pipe (6).
2 Remove the bolts (32) and the washers (31) that attach the clamp blocks (30) to the structure.
3 Remove the clamp blocks (30).
(e) Remove the hydraulic pipe (6) from the pylon.
(f) Remove the bushing (28) from the hydraulic pipe (6).
(g) Put the PLUG - BLANKING in the disconnected line ends.
(8) Removal of the hydraulic pipe (4):
(a) Disconnect the hydraulic pipe (4) from the coupling (42).
1 Drain the hydraulic fluid into the CONTAINER 5 L (1.32 USGAL).
(b) Disconnect the hydraulic pipe (4) from the hydraulic pipe (48).
(c) Removal of the two clamps (11):
1 Hold the hydraulic pipe (4).
2 Remove the bolts (13) and the washers (12) that attach the clamps (11) to the structure.
3 Remove the clamps (11).
(d) Remove the hydraulic pipe (4) from the pylon.
(e) Remove the bushing (27) from the hydraulic pipe (4).
(f) Put the PLUG - BLANKING in the disconnected line ends.
(9) Removal of the hydraulic pipe (5):
(a) Disconnect the hydraulic pipe (37) from the check valve (38).
(b) Remove the screws (36), washers (35) and anti-rotation device (40).
(c) Disconnect the check valve (38) from the hydraulic pipe (5).
1 Remove and discard the packing (39).
2 Drain the hydraulic fluid into the CONTAINER 5 L (1.32 USGAL).
3 Put the CAP - PROTECTION on the two ends of the check valve (38).
(d) Remove the screw (33) and the washer (34).
(e) Put the PLUG - BLANKING in the disconnected line ends.
(f) Disconnect the hydraulic pipe (5) from the hydraulic pipe (51).
(g) Removal of the clamp (8):
1 Hold the hydraulic pipe (5).
2 Remove the bolts (10) and the washers (9) that attach the clamp (8) to the structure.
3 Remove the clamp (8).
(h) Remove the hydraulic pipe (5) from the pylon.
(i) Remove the bushing (29) from the hydraulic pipe (5).
(j) Put the PLUG - BLANKING in the disconnected line ends.

Subtask 29-11-49-020-136-A

B. Removal of the Middle Pressure/Suction/Case Drain/Return Piping of the Green Hydraulic System in the Engine Pylon
(1) Removal of the hydraulic pipe (48):
(a) Remove the bolts (52) and the washers (54) that attach the hydraulic pipe (48) to the structure.
(b) Removal of the half clamp blocks (72) and (75):
1 Remove the nuts (76).
2 Remove the bolts (70) and the washers (71) that attach the half clamp block (72) to the half clamp block (75).
3 Remove the bolt (70) and the washer (71) that attach the close comb (83).
4 Remove the nut (82).
5 Hold the close comb (83) and remove the bolt (80) and the washer (79).
6 Remove the close comb (83).
7 Remove the nut (81) from the close comb (83).
8 Hold the half clamp block (72) and remove the bolts (74) and the washers (73).
9 Remove the half clamp block (72).
10 Hold the half clamp block (75) and remove the bolts (78) and the washers (77).
11 Remove the half clamp block (75).
(c) Disconnect the hydraulic pipe (48) from the hydraulic pipe (99).
(d) Removal of the two clamps (97):
1 Hold the hydraulic pipe (48).
2 Remove the bolts (95) and the washers (96) that attach the clamps (97) to the structure.
3 Remove the clamps (97).
(e) Drain the hydraulic fluid of the hydraulic pipe (48) into the CONTAINER 5 L (1.32 USGAL).
(f) Remove the hydraulic pipe (48) from the pylon.
(g) Remove the bushing (84) from the hydraulic pipe (48).
(h) Put PLUG - BLANKING on the disconnected line ends.
(2) Removal of the hydraulic pipe (49):
(a) Remove the bolts (53) and the washers (54) that attach the hydraulic pipe (49) to the structure.
(b) Disconnect the hydraulic pipe (49) from the hydraulic pipe (100).
(c) Removal of the clamp (58):
1 Remove the bolts (60) and the washers (59) that attach the clamp (58) to the structure.
2 Remove the clamp (58).
(d) Removal of the clamp (61):
1 Remove the bolts (63) and the washers (62) that attach the clamp (61) to the structure.
2 Remove the clamp (61).
(e) Removal of the clamp (64):
1 Remove the bolts (66) and the washers (65) that attach the clamp (64) to the structure.
2 Remove the clamp (64).
(f) Removal of the clamp (67):
1 Hold the hydraulic pipe (49).
2 Remove the bolts (69) and the washers (68) that attach the clamp (67) to the structure.
3 Remove the clamp (67).
(g) Drain the hydraulic fluid of the hydraulic pipe (49) into the CONTAINER 5 L (1.32 USGAL).
(h) Remove the hydraulic pipe (49) from the pylon.
(i) Remove the bushing (85) from the hydraulic pipe (49).
(j) Put PLUG - BLANKING on the disconnected line ends.
(3) Removal of the hydraulic pipe (51):
(a) Remove the bolts (52) and the washers (54) that attach the hydraulic pipe (51) to the structure.
(b) Disconnect the hydraulic pipe (51) from the hydraulic pipe (101).
(c) Removal of the clamp blocks (55):
1 Remove the bolts (57) and the washers (56) that attach the clamp blocks (55) to the structure.
2 Remove the clamp blocks (55).
(d) Removal of the clamp blocks (94):
1 Remove the bolts (92) and the washers (93) that attach the clamp blocks (94) to the structure.
2 Remove the clamp blocks (94).
(e) Removal of the clamp blocks (90):
1 Hold the hydraulic pipe (51).
2 Remove the nuts (91).
3 Remove the bolts (88) and the washers (89).
4 Remove the clamp blocks (90).
(f) Drain the hydraulic fluid of the hydraulic pipe (51) into the CONTAINER 5 L (1.32 USGAL).
(g) Remove the hydraulic pipe (51) from the pylon.
(h) Remove the bushing (87) from the hydraulic pipe (51).
(i) Put PLUG - BLANKING on the disconnected line ends.
(4) Removal of the hydraulic pipe (50):
(a) Remove the bolts (53) and the washers (54) that attach the hydraulic pipe (50) to the structure.
(b) Hold the hydraulic pipe (50).
(c) Disconnect the hydraulic pipe (50) from the hydraulic pipe (98).
(d) Drain the hydraulic fluid of the hydraulic pipe (50) into the CONTAINER 5 L (1.32 USGAL).
(e) Remove the hydraulic pipe (50) from the pylon.
(f) Remove the bushing (86) from the hydraulic pipe (50).
(g) Put PLUG - BLANKING on the disconnected line ends.

Subtask 29-11-49-020-138-A

C. Removal of the Aft Pressure/Suction/Case Drain/Return Piping of the Green Hydraulic System in the Engine Pylon
(1) Removal of the hydraulic pipe (98):
(a) Disconnect the hydraulic pipe (98) from the pylon/wing interface.
1 Drain the hydraulic fluid into the CONTAINER 5 L (1.32 USGAL).
(b) Removal of the clamp (119):
1 Remove the nut (118).
2 Remove the bolt (121) and the washer (120) that attach the clamp (119) to the structure.
3 Remove the clamp (119).
(c) Removal of the clamp (115):
1 Remove the bolts (117) and the washers (116) that attach the clamp (115) to the structure.
2 Remove the clamp (115).
(d) Removal of the clamp (104):
1 Hold the hydraulic pipe (98).
2 Remove the bolts (102) and the washers (103) that attach the clamp (104) to the structure.
3 Remove the clamp (104).
(e) Remove the hydraulic pipe (98) from the pylon.
(f) Put PLUG - BLANKING on the disconnected line ends.
(2) Removal of the hydraulic pipe (101):
(a) Disconnect the hydraulic pipe (101) from the pylon/wing interface.
1 Drain the hydraulic fluid into the CONTAINER 5 L (1.32 USGAL).
(b) Removal of the clamp (112):
1 Hold the hydraulic pipe (101).
2 Remove the bolts (114) and the washers (113) that attach the clamp (112) to the support (111).
3 Remove the clamp (112).
(c) Remove the hydraulic pipe (101) from the pylon.
(d) Put PLUG - BLANKING on the disconnected line ends.
(3) Removal of the hydraulic pipes (99) and (100):
(a) Hold the support (111).
(b) Remove the bolts (107) and the washers (106).
(c) Remove the support (111).
(d) Removal of the clamp (108):
1 Hold the support (105).
2 Remove the bolts (110) and the washers (109).
3 Remove the support (105).
4 Remove the clamp (108) from the pipe (100).
(e) Disconnect the hydraulic pipe (100) from the pylon/wing interface and hold it.
1 Drain the hydraulic fluid into the CONTAINER 5 L (1.32 USGAL).
(f) Remove the hydraulic pipe (100) from the pylon.
(g) Disconnect the hydraulic pipe (99) from the pylon/wing interface and hold it.
1 Drain the hydraulic fluid into the CONTAINER 5 L (1.32 USGAL).
(h) Remove the hydraulic pipe (99) from the pylon.
(i) Put PLUG - BLANKING on the disconnected line ends.

[Rev.10 from 2021] 2026.04.01 00:17:56 UTC