Removal of the Fluid Sampling Valve of the Green Hydraulic System

TASK 29-11-34-000-001-A
Removal of the Fluid Sampling Valve of the Green 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: 147
ZONE: 148
FIN: 1187GM

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)
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
147	MAIN GEAR WELL AND HYDRAULIC COMPARTMENT
148	MAIN GEAR WELL AND HYDRAULIC COMPARTMENT
197CB

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
Fluid Sampling Valve on HP Manifold with P/N series 1559A9900

3. Job Set-up
Subtask 29-11-34-865-050-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	HYDRAULIC/G HYD/PUMP ENG1/CTL	1701GK	H12
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/G HYD/PUMP ENG1/CTL	1701GK	R35
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/G HYD/PUMP ENG1/MONG	1702GK	R34
** ON A/C ALL
121VU	HYDRAULIC/LOW/LVL/IND	1832GQ	N32
121VU	HYDRAULIC/HYD/QTY/IND	1831GQ	P35
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/G HYD/PUMP ENG1/MONG	1702GK	R33

Subtask 29-11-34-010-050-A

B. Get Access
(1) Open the access door 197CB.
(2) Open the left door of the main gear (Ref. AMM TASK 32-12-00-010-001).

Subtask 29-11-34-860-050-A

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) 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.

(3) Make sure that the Green 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 Green hydraulic system (Ref. AMM TASK 29-14-00-614-001).
(5) Put an ACCESS PLATFORM 3M (10 FT) in position.
(6) Put a CONTAINER - HYDRAULIC FLUID RESISTANT below the HP manifold of the Green hydraulic system to collect unwanted hydraulic fluid.
(7) Disconnect the isolation coupling of the power transfer unit (PTU) (Ref. AMM TASK 29-23-00-860-001).

4. Procedure
Subtask 29-11-34-020-050-B

A. Removal of the Fluid Sampling Valve

Fluid Sampling Valve on HP Manifold with P/N series 1559A9900

WARNING: USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.

(1) Remove and discard the lockwire from the protective cap and the valve body of the fluid sampling valve (1). Do not remove the protective cap.
(2) Remove the fluid sampling valve (1) from the manifold. Discard the O-ring (2).
(3) Put a PLUG - BLANKING on the fluid sampling valve (1) and the manifold.

[Rev.10 from 2021] 2026.04.01 00:14:53 UTC