Removal of the HP Manifold of the Yellow Hydraulic System

TASK 29-13-14-000-001-A
Removal of the HP Manifold of the Yellow Hydraulic System

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

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 5 L (1.32 USGAL)
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
196BB, 198CB

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 29-14-00-614-001-A	Depressurization of the Hydraulic Reservoirs
TASK 29-23-00-860-001-A	Disconnection of the Isolation Coupling of the Power Transfer Unit (PTU)
HP Manifold with P/N series 1553A9900

3. Job Set-up
Subtask 29-13-14-865-050-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	HYD/HYD/PRESS/XMTR	1841GN	C11
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/HYD POWER/Y	3803GX	N30
** ON A/C ALL
121VU	HYDRAULIC/SOL VALVES/G/Y/B/LEAK/TST	1881GP	N35
** 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 29-13-14-860-050-A

B. Aircraft Maintenance Configuration

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.

(3) Make sure that the Yellow hydraulic system is depressurized and put it in the maintenance configuration.
(Ref. AMM TASK 29-00-00-864-001).
(4) Depressurize the reservoir of the Yellow hydraulic system (Ref. AMM TASK 29-14-00-614-001).
(5) Open the access door 198CB.
(6) Open the access door 196BB.
(7) Disconnect the isolation coupling of the power transfer unit (PTU) (Ref. AMM TASK 29-23-00-860-001).
(8) Put a CONTAINER 5 L (1.32 USGAL) below the HP manifold of the Yellow hydraulic system to collect hydraulic fluid.

4. Procedure
Subtask 29-13-14-020-050-B

A. Removal of the HP Manifold

HP Manifold with P/N series 1553A9900

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 (5), (41), (42) and (43).
(2) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(3) Loosen the pipe end-fitting (47) and disconnect the pipe (46) from the union (48).
(4) Loosen the pipe end-fitting (45) and disconnect the other end of the pipe (46) from the tee connector (44). Remove the pipe (46).
(5) Loosen the pipe end-fitting (30) and disconnect the pipe (29) from the union (31).
(6) Loosen the pipe end-fitting (23) and disconnect the pipe (22) from the check valve 3022GM.
(7) Loosen the pipe end-fitting (26) and disconnect the pipe (25) from the union (27).
(8) Loosen the pipe end-fitting (2) and disconnect the tee connector (1) from the union (3).
(9) Hold the manifold (17) and remove the five bolts (19) and the washers (20). Collect the five distance pieces (21) from between the manifold (17) and the structure.
(10) Remove the manifold (17).
(11) Put a PLUG - BLANKING on the disconnected line ends and the manifold ports.

[Rev.10 from 2021] 2026.04.01 00:19:53 UTC