Removal of the Ground Leakage-Measurement Manifold of the Green Hydraulic System

TASK 29-19-41-000-001-A
Removal of the Ground Leakage-Measurement Manifold of the Green Hydraulic System

ZONE: 147
FIN: 1146GM ** ON A/C NOT FOR ALL

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	1	CONTAINER 2 L (0.53 USGAL)
No specific	1	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
147	MAIN GEAR WELL AND HYDRAULIC COMPARTMENT

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)
TASK 32-12-00-010-001-A	Open the Main Gear Doors for Access
Ground Leakage-Measurement Manifold - Green Hydraulic System (1146GM)

3. Job Set-up
Subtask 29-19-41-865-050-A ** ON A/C NOT FOR ALL

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/SOL VALVES/G/Y/B/LEAK/TST	1881GP	N35
121VU	HYDRAULIC/G HYD/PUMP ENG1/CTL	1701GK	R35
121VU	HYDRAULIC/G HYD/PUMP ENG1/MONG	1702GK	R34

Subtask 29-19-41-941-050-A ** ON A/C NOT FOR ALL

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

In the cockpit on the hydraulic section 40VU of the overhead panel
On the ground service panel of the Green hydraulic system.

Subtask 29-19-41-860-052-A ** ON A/C NOT FOR ALL

C. Aircraft Maintenance Configuration

WARNING: OBEY THE HYDRAULIC SAFETY PROCEDURES.

(1) Obey the hydraulic safety procedures (Ref. AMM TASK 29-00-00-910-002).
(2) Make sure that the Green hydraulic system is depressurized and put it in the maintenance configuration.
(Ref. AMM TASK 29-00-00-864-001).
(3) Depressurize the reservoir of the Green hydraulic system
(Ref. AMM TASK 29-14-00-614-001).
(4) Open the Right Hand (RH) main-door of the Main-Landing-Gear (Ref. AMM TASK 32-12-00-010-001).
(5) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position at the RH main door of the main gear.
(6) Put a CONTAINER 2 L (0.53 USGAL) below the manifold 1146GM to collect unwanted fluid.
(7) Disconnect the isolation coupling of the Power Transfer Unit (PTU) (Ref. AMM TASK 29-23-00-860-001).

4. Procedure
Subtask 29-19-41-020-050-B ** ON A/C NOT FOR ALL

A. Removal of the Ground Leakage-Measurement Manifold 1146GM

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) Loosen the pipe end-fitting (11) and disconnect the pipe (10) from the union (12).
(2) Loosen the pipe end-fitting (8) and disconnect the pipe (7) from the union (9).
(3) Loosen the pipe end-fitting (5) and disconnect the pipe (6) from the union (4).
(4) Loosen the pipe end-fitting (14) and disconnect the pipe (15) from the union (13).
(5) Loosen the pipe end-fitting (17) and disconnect the pipe (16) from the union (18).
(6) Hold the manifold (1) and remove the bolts (2), the washers (3) and the manifold (1).
(7) Install PLUG - BLANKING in all pipe connections and on the unions.

[Rev.10 from 2021] 2026.04.01 00:25:31 UTC