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

TASK 29-13-49-000-811-A
Removal of the Pressure/Suction/Case Drain/Return Piping of the Yellow 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.

CAUTION: DO NOT LET ENGINE FUEL, OIL OR HYDRAULIC FLUID SPILL ON THE ENGINE. YOU MUST IMMEDIATELY REMOVE UNWANTED FUEL, OIL OR HYDRAULIC FLUID WITH A CLOTH. FUEL, OIL OR HYDRAULIC FLUID CAN CAUSE DAMAGE TO SOME ENGINE PARTS.

ZONE: 420
ZONE: 480

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 - BLANKING
No specific	1	CONTAINER 5 L (1.32 USGAL)
No specific	AR	PLUG - BLANKING
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	1	SPATULA - NON METALLIC
No specific	AR	WARNING NOTICE(S)
No specific	1	WRENCH - CROWFOOT
No specific	1	WRENCH - STANDARD
98D27803000000	1	LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
420	ENG 2 PYLON BOX AND FORWARD FAIRING
480	ENGINE 2 AFT PYLON
195BB, 198CB
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
425AL, 425AR, 425BL, 425CR, 447AL, 448AR, 481AL, 481BL, 482CR, 485AL

C. Referenced Information

REFERENCE	DESIGNATION
TASK 24-41-00-861-002-A	Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01	Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02	Energize the Aircraft Electrical Circuits from Engine 1(2)
TASK 26-21-41-000-001-E	Removal of the Engine Fire-Extinguisher Bottle
TASK 26-21-49-000-803-A	Removal of the Engine Fire-Extinguishing Pipe (Aft Part)
TASK 27-00-00-480-002-A	Installation of the Flap/Slat Control-Lever Locking Tool (98D27803000000)
TASK 29-10-00-864-002-A	Depressurize the Yellow Hydraulic System
TASK 29-11-16-000-801-A	Removal of the Pylon Manifold
TASK 29-14-00-614-001-A	Depressurization of the Hydraulic Reservoirs
TASK 54-53-11-000-804-A	Removal of the Pylon-to-Wing Access Panels and Doors
TASK 54-54-00-000-802-A	Removal of the Rear Pylon Fairing (RPF)
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 78-30-00-040-805-A	Deactivation of the Thrust Reverser System for Ground Maintenance
Aft Pressure/Suction/Case Drain/Return Piping of the Yellow Hydraulic System in the Engine Pylon
Forward and Middle Pressure/Suction/Case Drain/Return Piping of the Yellow Hydraulic System in the Engine Pylon

3. Job Set-up
Subtask 29-13-49-861-051-A ** ON A/C NOT FOR ALL

A. Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).

Subtask 29-13-49-860-141-A ** ON A/C NOT FOR ALL

B. Aircraft Maintenance Configuration
(1) Make sure that the Yellow hydraulic system is depressurized.
(Ref. AMM TASK 29-10-00-864-002).
(2) Depressurize the reservoir of the Yellow hydraulic system.
(Ref. AMM TASK 29-14-00-614-001).
(3) On the ECAM control panel, push the HYD key:

On the lower ECAM DU, the HYD page comes into view.

(4) On the overhead panel 20VU:

Lift the guard and release the ENG2/FIRE pushbutton switch.

(5) On the lower ECAM DU, on the HYD page:

Make sure that the fire shutoff valve (3046GD) is closed.

Subtask 29-13-49-941-124-A ** ON A/C NOT FOR ALL

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 198CB:
(a) Put a WARNING NOTICE(S) in position to tell persons not to pressurize the Yellow hydraulic system on the ground service panel.
(3) On the HYD section of panel 40VU:

Put a WARNING NOTICE(S) in position to tell persons not to pressurize the Yellow 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 Yellow 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) on the flap/slat control lever to tell persons not to operate the flap/slat controls.

(6) Do the procedure to prevent engine motoring (Ref. AMM TASK 71-00-00-860-833).

Subtask 29-13-49-865-108-A ** ON A/C NOT FOR ALL

D. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
FOR FIN: 6WE2 (BOTTLE 1FIRE EXTING, ENG 2)
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/B	2WE1	Q44
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/A	1WE1	Q43
** ON A/C NOT FOR ALL
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/B	2WE1	Q43
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/A	1WE1	Q42
** ON A/C NOT FOR ALL
FOR FIN: 8WE2 (BOTTLE 2FIRE EXTING, ENG 2)
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/B	2WE2	Q42
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/A	1WE2	Q41
** ON A/C NOT FOR ALL
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/B	2WE2	Q41
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/A	1WE2	Q40

Subtask 29-13-49-010-137-A ** ON A/C NOT FOR ALL

E. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-802):
(a) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL 448AR

Subtask 29-13-49-040-082-A ** ON A/C NOT FOR ALL

F. 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 78-30-00-040-805).

Subtask 29-13-49-010-140-A ** ON A/C NOT FOR ALL

G. Get Access
(1) Remove these access panels (Ref. AMM TASK 54-53-11-000-804):
(a) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)

482CR, 425CR, 425AR,
481BL, 425BL, 481AL, 425AL.

(2) Remove the rear pylon fairing (RPF) (Ref. AMM TASK 54-54-00-000-802):
(a) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)

485AL.

(3) Put an ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position at the zones 420 and 480.

Subtask 29-13-49-020-127-A ** ON A/C NOT FOR ALL

H. 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 26-21-49-000-803).

4. Procedure
Subtask 29-13-49-020-129-A ** ON A/C NOT FOR ALL

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

Aft Pressure/Suction/Case Drain/Return Piping of the Yellow Hydraulic System in the Engine Pylon ** ON A/C NOT FOR ALL

(1) Removal of the hydraulic pipe (36):
(a) Disconnect the hydraulic pipe (36) from the pylon/wing interface.
1 Drain the hydraulic fluid in the CONTAINER 5 L (1.32 USGAL).
(b) Remove the clamp (54).
1 Remove the nut (55), bolt (52), washer (53) and the clamp (54).
(c) Remove the clamp (46).
1 Remove the bolt (48), washer (47) and the clamp (46).
(d) Remove the clamp (49).
1 Remove the bolt (51), washer (50) and the clamp (49).
(e) Hold the hydraulic pipe (36) with a WRENCH - STANDARD and disconnect the hydraulic pipe (5).
1 Drain the hydraulic fluid in the CONTAINER 5 L (1.32 USGAL).
(f) Remove the hydraulic pipe (36).
(g) Put PLUG - BLANKING on the disconnected line ends.
(2) Removal of the hydraulic hose (39):
(a) Disconnect the hydraulic hose (39) from the pylon/wing interface.
1 Drain the hydraulic fluid in the CONTAINER 5 L (1.32 USGAL).
(b) Remove the clamp (40).
1 Remove the bolt (42), washer (41) and the clamp (40).
(c) Hold the hydraulic hose (39) with a WRENCH - STANDARD and disconnect the hydraulic pipe (4).
1 Drain the hydraulic fluid in the CONTAINER 5 L (1.32 USGAL).
(d) Remove the hydraulic hose (39) from the pylon.
(e) Put PLUG - BLANKING on the disconnected line ends.
(3) Removal of the hydraulic hose (38):
(a) Removal of the support (71):
1 Hold the support (71) and remove the bolts (72) and the washers (73).
2 Remove the support (71) from the structure.
(b) Disconnect the hydraulic hose (38) from the pylon/wing interface.
1 Drain the hydraulic fluid in the CONTAINER 5 L (1.32 USGAL).
(c) Remove the clamp (43).
1 Remove the bolt (45), washer (44) and the clamp (43).
2 Remove the clamp (43) from the structure.
(d) Hold the support (70) and remove the hydraulic hose (38).
(e) Put PLUG - BLANKING on the disconnected line ends.
(4) Remove the support (70) from the structure.
(5) Removal of the hydraulic hose (37):
(a) Disconnect the hydraulic pipe (2) from the hydraulic pipe (37).
1 Drain the hydraulic fluid in the CONTAINER 5 L (1.32 USGAL).
(b) Disconnect the hydraulic hose (37) from the pylon/wing interface and remove it from the pylon.
1 Drain the hydraulic fluid in the CONTAINER 5 L (1.32 USGAL).
(c) Put PLUG - BLANKING on the disconnected line ends.

Subtask 29-13-49-020-128-A ** ON A/C NOT FOR ALL

B. Removal of the Forward and Middle Pressure/Suction/Case Drain/Return Piping of the Yellow Hydraulic System in the Engine Pylon

Forward and Middle Pressure/Suction/Case Drain/Return Piping of the Yellow Hydraulic System in the Engine Pylon ** ON A/C NOT FOR ALL

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 pipes (1) and (7):
(a) Disconnect the hydraulic pipes (1) and (7) from the pylon fuel-hydraulic plate (56).
1 Drain the hydraulic fluid in the CONTAINER 5 L (1.32 USGAL).
(b) Hold the hydraulic pipe (1) and disconnect it from the hydraulic pipe (6).
(c) Remove the hydraulic pipe (1).
(d) Hold the hydraulic pipe (7) and disconnect it from the hydraulic pipe (2).
(e) Remove the hydraulic pipe (7).
(f) Put PLUG - BLANKING on the disconnected line ends.
(3) Removal of the hydraulic pipes (2) and (6):
(a) Remove the bolts (8) and the washers (9) that attach the hydraulic pipe (6) to the structure.
(b) Remove the bolts (10) and the washers (11) that attach the hydraulic pipe (2) to the structure.
(c) Remove the half clamp blocks (28) and (34).
1 Remove the nuts (31).
2 Remove the bolts (26) and the washers (27) that attach the half clamp block (28) to the half clamp block (34).
3 Hold the half clamp block (28) and remove the bolts (29) and the washers (30).
4 Remove the half clamp block (28).
5 Hold the clamp block (34) and remove the bolts (32) and the washers (33).
6 Remove the half clamp block (34).
(d) Install a WRENCH - CROWFOOT on the flats of the pylon manifold to hold it.
(e) Disconnect the hydraulic pipes (6) and (38) from the pylon manifold.
1 Drain the hydraulic fluid in the CONTAINER 5 L (1.32 USGAL).
2 Put CAP - BLANKING on the open ports of the pylon manifold.
(f) Remove the clamps (12).
1 Remove the bolts (13) and the washers (14) that attach the clamps (12) to the structure.
2 Remove the clamps (12).
(g) Remove the hydraulic pipe (2) from the pylon.
(h) Remove the clamps (17).
1 Remove the bolts (15) and the washers (16) that attach the clamp (17) to the structure.
2 Remove the clamp (17).
(i) Remove the hydraulic pipe (6) from the pylon.
(j) Put PLUG - BLANKING on the disconnected line ends.
(4) Removal of the hydraulic pipes (4) and (5):
(a) Removal of the support (74):
1 Remove the bolts (78), washers (77) and clamp (81).
2 Remove the bolt (79) and washer (80).
3 Remove the bolts (76) and washers (75).
4 Remove the support (74).
(b) Removal of the support (59):
1 Remove the bolts (62), washers (61) and clamp (60).
2 Remove the bolts (63), washers (64) and clamp (65).
3 Remove the bolts (66) and washers (69) that attach the support (59) to the structure.
4 Remove the bolts (68) and washers (67) that attach the support (59) to the structure.
5 Remove the support (59) from the structure.
(c) Disconnect the hydraulic pipe (57) from the hydraulic pipe (4).
(d) Disconnect the hydraulic pipe (58) from the hydraulic pipe (5).
(e) Remove the sealant from the head of the bolts (18) with SPATULA - NON METALLIC.
(f) Remove the bolts (18) and the washers (19) that attach the hydraulic tube (4) to the structure.
(g) Disconnect the hydraulic pipe (4) from the structure.
1 Drain the hydraulic fluid in the CONTAINER 5 L (1.32 USGAL).
(h) Remove the sealant from the head of the bolts (20) with SPATULA - NON METALLIC.
(i) Remove the bolts (20) and the washers (21) that attach the hydraulic pipe (5) to the structure.
(j) Disconnect the hydraulic pipe (5) from the structure.
1 Drain the hydraulic fluid in the CONTAINER 5 L (1.32 USGAL).
(k) Remove the clamp blocks (23).
1 Remove the bolts (25) and the washers (24) that attach the clamp blocks (23) to the structure.
2 Remove the clamp blocks (23).
(l) Remove the clamp block (83).
1 Remove the nuts (82), bolts (85) and washers (84).
2 Remove the clamp block (83).
(m) Remove the hydraulic pipes (4) and (5).
(n) Put PLUG - BLANKING on the disconnected line ends.
(5) Removal of the hydraulic pipe (3):
(a) Disconnect the hydraulic pipe (3) from the hydraulic filter Hydraulic Control Unit (HCU) (35).
1 Drain the hydraulic fluid in the CONTAINER 5 L (1.32 USGAL).
(b) Install a WRENCH - CROWFOOT on the flats of the pylon manifold to hold it.
(c) Disconnect the hydraulic pipe (3) from the pylon manifold (Ref. AMM TASK 29-11-16-000-801).
1 Drain the hydraulic fluid in the CONTAINER 5 L (1.32 USGAL).
2 Put CAP - BLANKING on the open port of the pylon manifold.
(d) Remove the hydraulic pipe (3).
(e) Put PLUG - BLANKING on the disconnected line ends.

[Rev.10 from 2021] 2026.04.01 00:23:07 UTC