Installation of the Air Relief Valve of the Blue Hydraulic System

TASK 29-14-17-400-002-A
Installation of the Air Relief Valve of the Blue Hydraulic System

WARNING: OBEY THE HYDRAULIC SAFETY PROCEDURES.

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: 2005GM

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	ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE
No specific	2	WARNING NOTICE(S)
No specific	Torque wrench: range to between 3.47 and 3.186 m.daN (25.59 and 23.50 lbf.ft )
No specific	Torque wrench: range to between 8.3 and 7.5 m.daN (61.21 and 55.31 lbf.ft )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.02ABA1)	Phosphate Ester Hydraulic Fluid-General Power - -
(Material No.14CCB6)	Testing Medium-Leak Detection - Oxygen System
No specific	lockwire 0.8 mm (0.032 in.)

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
197FB

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
3	O-RING	AIPC 29-14-04-05-050
3	O-RING	AIPC 29-14-84-08-020

E. 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 29-14-00-614-002-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)
Pressure Relief Valve

3. Job Set-up
Subtask 29-14-17-860-055-A

A. Aircraft Maintenance Configuration
(1) Make sure that the WARNING NOTICE(S) are in position to tell persons not to pressurize the 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) Obey the hydraulic safety procedures (Ref. AMM TASK 29-00-00-910-002).
(3) Make sure that the Blue hydraulic system is depressurized and put it in the maintenance configuration.
(Ref. AMM TASK 29-00-00-864-001).
(4) Make sure that the reservoir of the Blue hydraulic system is depressurized (Ref. AMM TASK 29-14-00-614-001).
(5) Make sure that the access door 197FB is open.
(6) Make sure that the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE is in position.

Subtask 29-14-17-865-054-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 29-14-17-420-051-A

A. Installation of the Air Relief Valve

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.

CAUTION: YOU MUST INSTALL HYDRAULIC TUBES WITH HYDRAULIC FLUID AS LUBRICANT.

(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.
(4) Make sure that the hydraulic line end-fittings are serviceable.
(5) Apply Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) to the threads of the air relief valve (2) and to the AIPC 29-14-04-05-050 O-RING (3) or AIPC 29-14-84-08-020 O-RING (3).
(6) Position the O-ring (3) and install the air relief valve (2) on the reservoir manifold (4).
(7) TORQUE the air relief valve (2) to between 3.47 and 3.186 m.daN (25.59 and 23.50 lbf.ft )

.
(8) Safety the air relief valve (2) with lockwire 0.8 mm (0.032 in.).
(9) Connect the union nut (1) to the air relief valve (2).
(10) TORQUE the union nut (1) to between 8.3 and 7.5 m.daN (61.21 and 55.31 lbf.ft )

5. Close-up
Subtask 29-14-17-790-051-A

A. Leak Test of the Air Relief Valve
(1) Pressurize the reservoir of the Blue hydraulic system (Ref. AMM TASK 29-14-00-614-002).
(2) Apply Testing Medium-Leak Detection - Oxygen System (Material No.14CCB6) to the connections of the air relief valve (2) and make sure that there are no leaks.

Subtask 29-14-17-410-051-A

B. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the access door 197FB.

Subtask 29-14-17-942-051-A

C. Put the aircraft back to the serviceable condition.
(1) Remove the warning notices from the cockpit and the ground service panel.
(2) Remove the access platform.

Subtask 29-14-17-865-055-A

D. 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

[Rev.10 from 2021] 2026.04.01 08:09:30 UTC