Installation of the Restrictor Valve

TASK 32-31-48-400-001-A
Installation of the Restrictor Valve

WARNING: MAKE SURE THAT ALL THE CIRCUITS IN MAINTENANCE ARE ISOLATED BEFORE YOU SUPPLY ELECTRICAL POWER TO THE AIRCRAFT. UNWANTED ELECTRICAL POWER CAN BE DANGEROUS.

WARNING: PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU START A TASK ON OR NEAR:

THE FLIGHT CONTROLS
THE FLIGHT CONTROL SURFACES
THE LANDING GEAR AND THE RELATED DOORS
COMPONENTS THAT MOVE.

MOVEMENT OF COMPONENTS CAN KILL OR CAUSE INJURY TO PERSONS AND/OR CAN CAUSE DAMAGE TO THE EQUIPMENT.

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

FIN: 2538GM

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 9.5 and 8.5 m.daN (70.06 and 62.68 lbf.ft )
No specific	Torque wrench: range to between 10.5 and 9.5 m.daN (77.43 and 70.06 lbf.ft )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.02ABA1)	Phosphate Ester Hydraulic Fluid-General Power - -

C. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
3	PACKING	AIPC 32-31-03-48-030
3	PACKING	AIPC 32-31-83-50-080

D. Referenced Information

REFERENCE	DESIGNATION
TASK 12-12-29-611-001-A	Fill the Hydraulic Fluid Reservoir with a Hand Pump
TASK 20-23-22-910-001-A	Marking of the Unions after Application of Standard or Specific Tightening Torque
TASK 24-41-00-862-002-A	De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01	De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02	De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
TASK 29-14-00-614-001-A	Depressurization of the Hydraulic Reservoirs
TASK 29-23-00-860-001-A	Disconnection of the Isolation Coupling of the Power Transfer Unit (PTU)
TASK 29-23-00-860-002-A	Connection of the Isolation Coupling of the Power Transfer Unit (PTU)
TASK 32-00-00-860-001-A	Flight Configuration Precautions with Electrical Power
TASK 32-00-00-860-001-A-01	Flight Configuration Precautions without Electrical Power
TASK 32-00-00-860-002-A	Ground Configuration after Flight Configuration with Electrical Power
TASK 32-00-00-860-002-A-01	Ground Configuration after Flight Configuration without Electrical Power
TASK 32-12-00-010-001-A	Open the Main Gear Doors for Access
TASK 32-12-00-410-001-A	Close the Main Gear Doors after Access
TASK 32-31-00-720-002-A	Functional Test of the Normal Extension and Retraction of the Landing Gear
TASK 51-75-13-916-002-A	Repair to a layer of Corrosion Preventive Compound
Restrictor Valve 2538GM

3. Job Set-up
Subtask 32-31-48-860-052-A

A. Aircraft Maintenance Configuration
(1) Make sure that the PTU isolation coupling is disconnected (Ref. AMM TASK 29-23-00-860-001).
(2) Make sure that the aircraft electrical circuits are de-energized (Ref. AMM TASK 24-41-00-862-002).
(3) Make sure that the flight configuration precautions were obeyed (Ref. AMM TASK 32-00-00-860-001).
(4) Make sure that the Green hydraulic system is depressurized (Ref. AMM TASK 29-14-00-614-001).
(5) Make sure that the reservoir of the Green hydraulic system is depressurized (Ref. AMM TASK 29-14-00-614-001).

Subtask 32-31-48-865-051-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	L/G/LGCIU/SYS1/NORM	1GA	C09
** ON A/C NOT FOR ALL
49VU	HYDRAULIC/G HYD/PUMP ENG1/CTL	1701GK	H12
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/G HYD/PUMP ENG1/CTL	1701GK	R35
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/G HYD/PUMP ENG1/MONG	1702GK	R34
** ON A/C ALL
121VU	HYDRAULIC/LGCIU/SYS2	2GA	Q35
121VU	HYDRAULIC/LGCIU/SYS1/GRND SPLY	52GA	Q34
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/G HYD/PUMP ENG1/MONG	1702GK	R33

Subtask 32-31-48-941-051-A

C. Make sure that the WARNING NOTICE(S) are in position to tell persons not to pressurize the Green hydraulic system:

On panel 40VU in the cockpit
On the ground service panel of the Green hydraulic system.

Subtask 32-31-48-860-051-A

D. Preparation for Installation
(1) Clean the component interfaces and the adjacent area.
(2) Do an inspection of the component interfaces and the adjacent area.
(3) Make sure that the parts retained from the removed component are clean and in the correct condition.

WARNING: OBEY THE HYDRAULIC SAFETY PROCEDURES.

(4) Apply Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) to the new packing (3).

4. Procedure
Subtask 32-31-48-420-050-B

A. Installation of the Restrictor Valve
(1) Remove the PLUG-BLANKING from each disconnected line end.
(2) Install the new AIPC 32-31-03-48-030 PACKING (3) or the new AIPC 32-31-83-50-080 PACKING (3) on the restrictor valve (2).
(3) Install the restrictor valve (2) in the manifold (4).
(a) Make sure that the arrow on the restrictor valve (2) points to the manifold (4).
(4) TORQUE the restrictor valve (2) to between 10.5 and 9.5 m.daN (77.43 and 70.06 lbf.ft )

.
(5) Connect the connector (1) to the restrictor valve (2) and TORQUE it to between 9.5 and 8.5 m.daN (70.06 and 62.68 lbf.ft )

.
(6) Identify the tightened union nuts with a red line
(Ref. AMM TASK 20-23-22-910-001).

Subtask 32-31-48-860-053-A

B. Preparation for Test
(1) Connect the PTU isolation coupling (Ref. AMM TASK 29-23-00-860-002).
(2) If the flight configuration precautions were obeyed, put the aircraft back to the serviceable condition (Ref. AMM TASK 32-00-00-860-002).
(3) Remove the container.
(4) Remove the WARNING NOTICE(S).
(5) Remove the access platform(s).
(6) Close the right MLG door (Ref. AMM TASK 32-12-00-410-001).
(7) If necessary, fill the reservoir of the Green hydraulic hydraulic system to the correct level (Ref. AMM TASK 12-12-29-611-001).

Subtask 32-31-48-865-052-A

C. 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	L/G/LGCIU/SYS1/NORM	1GA	C09
** ON A/C NOT FOR ALL
49VU	HYDRAULIC/G HYD/PUMP ENG1/CTL	1701GK	H12
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/G HYD/PUMP ENG1/CTL	1701GK	R35
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/G HYD/PUMP ENG1/MONG	1702GK	R34
** ON A/C ALL
121VU	HYDRAULIC/LGCIU/SYS2	2GA	Q35
121VU	HYDRAULIC/LGCIU/SYS1/GRND SPLY	52GA	Q34
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/G HYD/PUMP ENG1/MONG	1702GK	R33

Subtask 32-31-48-720-050-A

D. Do the functional test of the normal extension and retraction of the landing gear (Ref. AMM TASK 32-31-00-720-002).
(1) Open the right MLG door (Ref. AMM TASK 32-12-00-010-001).
(2) Make sure that there is no hydraulic fluid leakage from the restrictor valve (3).

5. Close-up
Subtask 32-31-48-410-050-A

A. Close Access
(1) Apply corrosion protection to the restrictor valve 2538GM, the connector and the adjacent area (Ref. AMM TASK 51-75-13-916-002).
(2) Make sure that the work area is clean and clear of tools and other items.
(3) Close the right MLG door (Ref. AMM TASK 32-12-00-410-001).
(4) Remove the ground support and maintenance equipment, the special and standard tools and all other items.

[Rev.10 from 2021] 2026.04.01 00:45:42 UTC