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

TASK 29-19-41-000-002-A
Removal of the Ground Leakage-Measurement Manifold of the Blue Hydraulic System

FIN: 2146GM ** 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
195BB

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
Ground Leakage-Measurement Manifold - Blue Hydraulic System (2146GM)

3. Job Set-up
Subtask 29-19-41-865-053-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
49VU	HYD/HYD PWR/B WARN/& CTL	2702GJ	C12
121VU	HYDRAULIC/SOL VALVES/G/Y/B/LEAK/TST	1881GP	N35
123VU	B HYD/ELEC PUMP	2701GJ	AB09

Subtask 29-19-41-941-051-A ** ON A/C NOT FOR ALL

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

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

Subtask 29-19-41-860-053-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 Blue 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 Blue hydraulic system.
(Ref. AMM TASK 29-14-00-614-001).

Subtask 29-19-41-010-051-A ** ON A/C NOT FOR ALL

D. Open the access door 195BB.

Subtask 29-19-41-941-054-A ** ON A/C NOT FOR ALL

E. Put a CONTAINER 2 L (0.53 USGAL) below the manifold 2146GM to collect unwanted fluid.

4. Procedure
Subtask 29-19-41-020-053-B ** ON A/C NOT FOR ALL

A. Removal of the Ground Leakage-Measurement Manifold 2146GM

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 (5) and disconnect the pipe (6) from the union (4).
(2) Loosen the union nut (8) and disconnect the tee-piece (7) together with the attached pipes from the union (9).
(3) Loosen the pipe end-fitting (11) and disconnect the pipe (12) from the union (10).
(4) Loosen the pipe end-fitting (14) and disconnect the pipe (13) from the union (15).
(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) and the washers (3).
(7) Remove the manifold (1).
(8) Install a PLUG - BLANKING in all the pipe connections and on the unions.

[Rev.10 from 2021] 2026.04.01 00:25:34 UTC