Installation of the Air Pressure Gage of the Blue Hydraulic System

TASK 29-14-15-400-002-A
Installation of the Air Pressure Gage of the Blue 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.

FIN: 2383GM

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	WARNING NOTICE(S)
No specific	Torque wrench: range to between 1.71 and 1.52 m.daN (12.61 and 11.21 lbf.ft )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.14CCB6)	Testing Medium-Leak Detection - Oxygen System
No specific	lockwire, corrosion resistant steel, 0.8mm (0.032 in.)

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
197FB

D. 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
TASK 29-14-00-614-002-A	Pressurization of the Hydraulic Reservoirs through the Ground Connector
TASK 29-14-00-614-002-A-01	Pressurization of the Hydraulic Reservoirs with the Auxiliary Power Unit (APU)
Air Pressure Gage

3. Job Set-up
Subtask 29-14-15-860-056-A

A. Aircraft Maintenance Configuration
(1) Make sure that the WARNING NOTICE(S) are 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) Make sure that the reservoir of the Blue hydraulic system is depressurized (Ref. AMM TASK 29-14-00-614-001).
(4) Make sure that the access door 197FB is open.

Subtask 29-14-15-865-054-A

B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	HYD/HYD PWR/B WARN/& CTL	2702GJ	C12
121VU	HYDRAULIC/LOW/LVL/IND	1832GQ	N32
121VU	HYDRAULIC/HYD/QTY/IND	1831GQ	P35
123VU	B HYD/ELEC PUMP	2701GJ	AB09

4. Procedure
Subtask 29-14-15-420-051-A

A. Installation of the Air Pressure Gage
(1) Clean the component interfaces and the adjacent area.
(2) Do an inspection of the component interfaces and the adjacent area.
(3) Remove the blanking plugs from the pressure gage (1) and from the ports on the top of the reservoir.
(4) Install the pressure gage (1) on the adapter (2).
(5) Hold the adapter (2) and TORQUE the connector of the pressure gage (1) to between 1.71 and 1.52 m.daN (12.61 and 11.21 lbf.ft )

.
(6) Safety the pressure gage (1) and the adapter (2) to the reservoir with lockwire, corrosion resistant steel, 0.8mm (0.032 in.).

Subtask 29-14-15-790-051-A

B. Test
(1) Pressurize the reservoir of the Blue hydraulic system (Ref. AMM TASK 29-14-00-614-002).
(2) Apply leak detector Testing Medium-Leak Detection - Oxygen System (Material No.14CCB6) to the connection of the pressure gage (1) and the adapter (2) and make sure that there are no leaks.

5. Close-up
Subtask 29-14-15-865-055-A

A. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	HYD/HYD PWR/B WARN/& CTL	2702GJ	C12
121VU	HYDRAULIC/LOW/LVL/IND	1832GQ	N32
121VU	HYDRAULIC/HYD/QTY/IND	1831GQ	P35
123VU	B HYD/ELEC PUMP	2701GJ	AB09

Subtask 29-14-15-860-057-A

B. Put the aircraft back to the serviceable condition.
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the warning notices from the cockpit and from the ground service panel of the Blue hydraulic system.

Subtask 29-14-15-410-051-A

C. Close the access door 197FB.

[Rev.10 from 2021] 2026.04.01 00:24:29 UTC