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

TASK 29-19-41-000-003-A
Removal of the Ground Leakage-Measurement Manifold of the Yellow Hydraulic System

FIN: 3146GM ** 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	CONTAINER 2 L (0.53 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
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 29-14-00-614-001-A	Depressurization of the Hydraulic Reservoirs
TASK 29-23-00-860-001-A	Disconnection of the Isolation Coupling of the Power Transfer Unit (PTU)
Ground Leakage-Measurement Manifold - Yellow Hydraulic System (3146GM)

3. Job Set-up
Subtask 29-19-41-865-056-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/HYD POWER/Y	3803GX	N30
123VU	Y HYD/ELEC/PUMP	3802GX	AB06
123VU	Y HYD/ELEC/ELEC PUMP/NORM	3801GX	AB03

Subtask 29-19-41-941-052-A ** ON A/C NOT FOR ALL

B. 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 29-19-41-010-052-A ** ON A/C NOT FOR ALL

C. Open the access door 196BB.

Subtask 29-19-41-860-054-A ** ON A/C NOT FOR ALL

D. Aircraft Maintenance Configuration

WARNING: OBEY THE HYDRAULIC SAFETY PROCEDURES.

(1) Obey the hydraulic safety procedures (Ref. AMM TASK 29-00-00-910-002).
(2) Depressurize the Yellow hydraulic system
(Ref. AMM TASK 29-00-00-864-001).
(3) Depressurize the reservoir of the Yellow hydraulic system.
(Ref. AMM TASK 29-14-00-614-001).
(4) Put a CONTAINER 2 L (0.53 USGAL) below the manifold 3146GM to collect unwanted fluid.
(5) Disconnect the isolation coupling of the Power Transfer Unit (PTU) (Ref. AMM TASK 29-23-00-860-001).

4. Procedure
Subtask 29-19-41-020-052-B ** ON A/C NOT FOR ALL

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.

A. Removal of the Ground Leakage- Measurement Manifold 3146GM

Ground Leakage-Measurement Manifold - Yellow Hydraulic System (3146GM) ** ON A/C NOT FOR ALL

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

[Rev.10 from 2021] 2026.04.01 00:25:36 UTC