Removal of the Accumulator-Gas Charging Valve

TASK 29-12-22-000-001-A
Removal of the Accumulator-Gas Charging Valve

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: 195
FIN: 2071GM

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	CAP - BLANKING
No specific	1	PLUG - BLANKING
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	1	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
195	HYDRAULIC COMPT AND FAIRINGS
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 29-14-00-614-001-A	Depressurization of the Hydraulic Reservoirs
Gas Charging Valve

3. Job Set-up
Subtask 29-12-22-865-050-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C 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 29-12-22-860-050-A

B. Aircraft Maintenance Configuration
(1) 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.

(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 29-12-22-010-050-A

C. Open the access door 195BB.

4. Procedure
Subtask 29-12-22-614-050-A

A. Depressurize the Power Accumulator (2070GM) (1)
(1) Remove the endcap (6) from the charging-valve (4).
(2) Turn the nut (5) carefully to the OPEN position and release the nitrogen pressure.

Subtask 29-12-22-020-050-A

B. Removal of the Gas Charging-valve (2071GM)
(1) Cut, remove and discard the lockwire from the gas charging-valve (4).
(2) Remove the gas charging valve (4)
(3) Install the PLUG - BLANKING in the adapter (2).
(4) Install the CAP - BLANKING on the gas charging-valve (4).

[Rev.10 from 2021] 2026.04.01 07:53:46 UTC