Removal of the Accumulator-Air Pressure Gage

TASK 29-12-21-000-001-A
Removal of the Accumulator-Air Pressure Gage

FIN: 2072GM

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	2	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 29-14-00-614-001-A	Depressurization of the Hydraulic Reservoirs
Pressure Gage

3. Job Set-up
Subtask 29-12-21-865-050-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 29-12-21-860-051-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 29-12-21-010-050-A

C. Open the access door 195BB.

4. Procedure
Subtask 29-12-21-614-051-A

A. Depressurization of the Power Accumulator (2072GM)
(1) Remove the endcap from the charging valve (4).
(2) Turn the nut to the OPEN position and release the nitrogen pressure.

Subtask 29-12-21-020-050-A

B. Removal of the Pressure Gage
(1) Cut, remove and discard the lockwire from the pressure gage (1).
(2) Hold the pressure gage (1) and loosen the nut (2).
(3) Remove the pressure gage (1).
(4) Install a PLUG - BLANKING on the pressure gage (1) and the adapter (3).

[Rev.10 from 2021] 2026.04.01 07:51:06 UTC