Removal of the Yellow Hydraulic Reservoir

TASK 29-13-41-000-002-A
Removal of the Yellow Hydraulic Reservoir

WARNING: MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING GEAR. THIS WILL PREVENT UNWANTED MOVEMENT OF THE LANDING GEAR, AND THUS POSSIBLE INJURY TO PERSONS AND DAMAGE TO THE AIRCRAFT AND/OR EQUIPMENT.

ZONE: 196
FIN: 3000GQ

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	CAP - BLANKING
No specific	1	CONTAINER - HYDRAULIC FLUID RESISTANT
No specific	AR	PLUG - BLANKING
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	2	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
196	HYDRAULIC COMPT AND FAIRINGS
196AB, 196BB

C. Referenced Information

REFERENCE	DESIGNATION
TASK 29-00-00-864-001-A	Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action
TASK 29-00-00-910-002-A	Safety Procedures of the Hydraulic System
TASK 29-10-00-680-002-A	Drainage of the Reservoir of the Yellow Hydraulic System
TASK 29-14-00-614-001-A	Depressurization of the Hydraulic Reservoirs
TASK 29-23-00-860-001-A	Disconnection of the Isolation Coupling of the Power Transfer Unit (PTU)
Reservoir of the Yellow Hydraulic System (Sheet 1)
Reservoir of the Yellow Hydraulic System (Sheet 2)

3. Job Set-up
Subtask 29-13-41-865-053-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/HYD POWER/Y	3803GX	N30
** ON A/C ALL
121VU	HYDRAULIC/LOW/LVL/IND	1832GQ	N32
121VU	HYDRAULIC/HYD/QTY/IND	1831GQ	P35
121VU	HYDRAULIC/Y HYD/PUMP ENG2/MONG	3700GD	Q37
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/HYD POWER/Y	3803GX	N31
** ON A/C ALL
123VU	Y HYD/ELEC/PUMP	3802GX	AB06
123VU	Y HYD/ELEC/ELEC PUMP/NORM	3801GX	AB03

Subtask 29-13-41-941-053-A

B. Safety Precautions

WARNING: OBEY THE HYDRAULIC SAFETY PROCEDURES.

(1) Obey the hydraulic safety procedures (Ref. AMM TASK 29-00-00-910-002).
(2) Put the WARNING NOTICE(S) in position to tell persons not to pressurize the Yellow hydraulic system:

in the cockpit on the hydraulic section 40VU of the overhead panel,
on the ground service panel of the Yellow hydraulic system.

Subtask 29-13-41-010-053-A

C. Open the access doors 196BB 196AB.

Subtask 29-13-41-860-058-A

D. Aircraft Maintenance Configuration
(1) Make sure that the Yellow hydraulic system is depressurized and put it in the maintenance configuration.
(Ref. AMM TASK 29-00-00-864-001).
(2) Depressurize the reservoir of the Yellow hydraulic system (Ref. AMM TASK 29-14-00-614-001).
(3) Disconnect the isolation coupling of the Power Transfer Unit (PTU) (Ref. AMM TASK 29-23-00-860-001).
(4) Put a CONTAINER - HYDRAULIC FLUID RESISTANT below the reservoir.
(5) Drain the reservoir of the Yellow hydraulic system (Ref. AMM TASK 29-10-00-680-002).

4. Procedure
Subtask 29-13-41-020-054-B

A. Removal of the Reservoir

CAUTION: USE A SECOND WRENCH TO APPLY COUNTERTORQUE TO THE UNION WHEN YOU DISCONNECT/CONNECT HYDRAULIC LINES ON UNIONS. IF YOU DO NOT USE THE SECOND WRENCH, THERE IS A RISK THAT YOU WILL LOOSEN OR TIGHTEN THE UNION TOO MUCH.

(1) Disconnect the electrical connectors (2),(7),(33).
(2) Install a CAP - BLANKING on the electrical connectors and on the electrical receptacles on the reservoir (1).
(3) Temporarily attach the electrical leads to the aircraft structure.
(4) Remove the nut (30), the bolt (26) and the washer (29) and disconnect the bonding jumpers (27),(28) from the reservoir (1).
(5) Loosen the union nut (36) and disconnect the air pipe (37) from the reservoir (1).
(6) Loosen the union nut (38) and remove the air pipe (37).
(7) Loosen the union nut (16) and disconnect the air bleed pipe (15) from the reducer (17).
(8) Remove the bolt (40), the washer (41) and the distance bush (43) which attach the P-clip (42) to the structure.
(9) Loosen the union nut (24) and disconnect the seal drain pipe (25) from the air pressure relief valve (23).
(10) Remove the two bolts (44), the washers (45) and the clamp block halves (46).
(11) Loosen the union nut (6) and disconnect the suction pipe (5) from the structure attachment.
(12) Loosen the union nut (8) and remove the suction pipe (5).
(13) Loosen the union nut (9) and disconnect the return pipe (10) from the reservoir (1).
(14) Loosen the union nut (12) and disconnect the suction pipe (11) from the reservoir (1).
(15) Cut and remove the lockwire from the two strap bolts (4).
(16) Hold the reservoir (1) and loosen the two reservoir strap bolts (4).
(17) Disconnect the ends of the reservoir straps (3) and remove the reservoir (1) from the aircraft.
(18) Install a PLUG - BLANKING in all open pipe ends, unions and the reservoir ports.

[Rev.10 from 2021] 2026.04.01 00:21:08 UTC