Replacement of the Quick-Release Coupling

TASK 32-11-12-960-801-A
Replacement of the Quick-Release Coupling

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: MAKE SURE THAT THE WHEEL CHOCKS ARE IN POSITION. MOVEMENT OF THE AIRCRAFT CAN BE DANGEROUS.

WARNING: LET THE BRAKES AND THE WHEELS BECOME COOL BEFORE YOU GO NEAR THE LANDING GEAR. DO NOT APPLY A LIQUID OR GAS DIRECTLY ON A HOT WHEEL OR BRAKE UNIT. THIS CAN CAUSE A TIRE EXPLOSION AND/OR A WHEEL RIM BURST.

WARNING: OBEY THE HYDRAULIC SAFETY PROCEDURES.

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

ZONE: 731
ZONE: 741

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

REFERENCE	QTY	DESIGNATION
No specific	AR	CHOCK - WHEEL(S)
No specific	1	CONTAINER 1 L (1/4 USGAL)
No specific	AR	PLUG - BLANKING
No specific	AR	SAFETY BARRIER(S)
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 3.2 and 2.9 m.daN (23.60 and 21.39 lbf.ft )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.08BAA9)	Non Aqueous Cleaner-General - -
(Material No.14QFB1)	Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
731	L.H MAIN GEAR
741	R.H MAIN GEAR

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
2	QUICK-RELEASE COUPLING	AIPC 32-11-12-03-010
2	QUICK-RELEASE COUPLING	AIPC 32-11-85-90-010

E. Referenced Information

REFERENCE	DESIGNATION
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 29-00-00-910-002-A	Safety Procedures of the Hydraulic System
TASK 29-10-00-864-001-A	Depressurize the Green Hydraulic System
TASK 29-10-00-864-002-A	Depressurize the Yellow Hydraulic System
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 32-00-00-481-001-A	Installation of the Safety Devices on the Landing Gears
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 32-42-00-710-001-A	Operational Check of the Normal Braking System
TASK 32-42-00-870-001-A	Bleeding of the Normal Braking at the Brake Units
TASK 32-43-00-710-001-A	Operational Check of Alternate Braking System
TASK 32-43-00-870-002-A	Bleeding of the High Pressure Alternate Braking System
TASK 32-45-00-710-001-A	Operational Check of the Parking Brake System
Quick-Release Coupling - Location and Detail

3. Job Set-up
Subtask 32-11-12-941-054-A

A. Safety Precautions
(1) Put the CHOCK - WHEEL(S) in position.
(2) Put the SAFETY BARRIER(S) in position.
(3) Make sure that the ground safety locks are on the landing gear (Ref. AMM TASK 32-00-00-481-001).
(4) Obey the hydraulic safety procedures (Ref. AMM TASK 29-00-00-910-002).
(5) On panel 400VU:

Make sure that the landing-gear control-lever 6GA is in the DOWN position
Put a WARNING NOTICE(S) in position to tell persons not to operate the landing gear.

(6) Put WARNING NOTICE(S) in position to tell persons not to pressurize the Yellow and Green hydraulic systems.

Subtask 32-11-12-860-054-A

B. Aircraft Maintenance Configuration
(1) Disconnect the isolation coupling of the PTU (Ref. AMM TASK 29-23-00-860-001).
(2) Make sure that the Green and the Yellow hydraulic systems are depressurized (Ref. AMM TASK 29-10-00-864-001) and (Ref. AMM TASK 29-10-00-864-002).
(3) Depressurize the Green and the Yellow hydraulic reservoirs (Ref. AMM TASK 29-14-00-614-001).
(4) If you did not open the LGCIU circuit breakers, make sure that the electrical circuits are de-energized (Ref. AMM TASK 24-41-00-862-002).
(5) If the electrical power is necessary, do the precautions for flight configuration (Ref. AMM TASK 32-00-00-860-001) before you open the LGCIU circuit breakers.

Subtask 32-11-12-865-053-A

C. 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
121VU	LGCIU/BAT SPLY/SYS2	59GA	R33
121VU	LGCIU/BAT SPLY/SYS1	58GA	R32
** ON A/C ALL
121VU	HYDRAULIC/BRAKING AND STEERING/SYS2/SPLY	4GG	M36
121VU	HYDRAULIC/BRAKING AND STEERING/SYS2/CTL	3GG	M35
121VU	HYDRAULIC/BRAKING AND STEERING/SYS1/CTL	1GG	M34
121VU	HYDRAULIC/PARK BRK/CTL/STBY	71GG	N37
121VU	HYDRAULIC/PARK BRK/CTL/NORM	70GG	N36
121VU	HYDRAULIC/LGCIU/SYS2	2GA	Q35
121VU	HYDRAULIC/LGCIU/SYS1/GRND SPLY	52GA	Q34
** ON A/C NOT FOR ALL
121VU	LGCIU/BAT SPLY/SYS2	59GA	R32
121VU	LGCIU/BAT SPLY/SYS1	58GA	R31

4. Procedure
Subtask 32-11-12-960-050-B ** ON A/C NOT FOR ALL

A. Replacement of the Quick-Release Coupling

WARNING: DO NOT GET THE FLUID ON YOUR SKIN OR IN YOUR EYES. IF YOU DO:

FLUSH IT AWAY WITH CLEAN WATER
GET MEDICAL AID.

WARNING: USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.

CAUTION: MAKE SURE THAT THE FLUID DOES NOT STAY ON THE AIRCRAFT STRUCTURE. IF THE FLUID GETS ON THE AIRCRAFT STRUCTURE, WASH IT OFF IMMEDIATELY WITH SOAP AND WATER.

(1) Disconnect the quick-release coupling (2) from the brake coupling (3).
(2) Put the quick-release coupling (2) into the CONTAINER 1 L (1/4 USGAL).
(3) Put the PLUG-BLANKING in each disconnected line end.
(4) Remove and discard the lockwire from the quick-release coupling (2) and the hose assembly (1).
(5) Remove the quick-release coupling (2) from the hose assembly (1). Drain the hydraulic fluid from the hose assembly (1).
(6) Use a clean Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-General - - (Material No.08BAA9) to clean:

The interfaces and the adjacent area.

(7) Install the new AIPC 32-11-12-03-010 QUICK-RELEASE COUPLING (2) to the hose assembly (1).

CAUTION: HOLD THE QUICK-RELEASE COUPLING WHEN YOU TORQUE THE HOSE ASSEMBLY AND MAKE SURE IT DOES NOT TURN. DAMAGE TO THE QUICK-RELEASE COUPLING CAN OCCUR IF IT TURNS.

(8) TORQUE the hose assembly (1) to between 3.2 and 2.9 m.daN (23.60 and 21.39 lbf.ft )

.
(9) Safety the quick-release coupling (2) to the hose assembly (1) with 14QFB1Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -.
(10) Remove the PLUG-BLANKING from each disconnected line end.
(11) Connect the quick-release coupling (2) to the brake coupling (3). Make sure that it is in the correct locked position.

Subtask 32-11-12-960-050-C ** ON A/C NOT FOR ALL

A. Replacement of the Quick-Release Coupling

WARNING: DO NOT GET THE FLUID ON YOUR SKIN OR IN YOUR EYES. IF YOU DO:

FLUSH IT AWAY WITH CLEAN WATER
GET MEDICAL AID.

CAUTION: MAKE SURE THAT THE FLUID DOES NOT STAY ON THE AIRCRAFT STRUCTURE. IF THE FLUID GETS ON THE AIRCRAFT STRUCTURE, WASH IT OFF IMMEDIATELY WITH SOAP AND WATER.

The interfaces and the adjacent area.

(7) Install the new AIPC 32-11-85-90-010 QUICK-RELEASE COUPLING (2) or AIPC 32-11-12-03-010 QUICK-RELEASE COUPLING (2) to the hose assembly (1).

CAUTION: HOLD THE QUICK-RELEASE COUPLING WHEN YOU TORQUE THE HOSE ASSEMBLY AND MAKE SURE IT DOES NOT TURN. DAMAGE TO THE QUICK-RELEASE COUPLING CAN OCCUR IF IT TURNS.

(8) TORQUE the hose assembly (1) to between 3.2 and 2.9 m.daN (23.60 and 21.39 lbf.ft )

Subtask 32-11-12-865-054-A

B. 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
121VU	LGCIU/BAT SPLY/SYS2	59GA	R33
121VU	LGCIU/BAT SPLY/SYS1	58GA	R32
** ON A/C ALL
121VU	HYDRAULIC/BRAKING AND STEERING/SYS2/SPLY	4GG	M36
121VU	HYDRAULIC/BRAKING AND STEERING/SYS2/CTL	3GG	M35
121VU	HYDRAULIC/BRAKING AND STEERING/SYS1/CTL	1GG	M34
121VU	HYDRAULIC/PARK BRK/CTL/STBY	71GG	N37
121VU	HYDRAULIC/PARK BRK/CTL/NORM	70GG	N36
121VU	HYDRAULIC/LGCIU/SYS2	2GA	Q35
121VU	HYDRAULIC/LGCIU/SYS1/GRND SPLY	52GA	Q34
** ON A/C NOT FOR ALL
121VU	LGCIU/BAT SPLY/SYS2	59GA	R32
121VU	LGCIU/BAT SPLY/SYS1	58GA	R31

Subtask 32-11-12-860-056-A

C. Aircraft Configuration
(1) If you did not de-energize the aircraft electrical circuits, put the aircraft back to the ground configuration (Ref. AMM TASK 32-00-00-860-002).

Subtask 32-11-12-710-051-A

D. Test
(1) Bleed the applicable brake unit (Ref. AMM TASK 32-42-00-870-001) and (Ref. AMM TASK 32-43-00-870-002).
(2) Do an operational test of the Normal Braking System (Ref. AMM TASK 32-42-00-710-001).
(3) Do an operational test of the Alternate Braking System with and/or without Anti-Skid (Ref. AMM TASK 32-43-00-710-001).
(4) Do an operational test of the Parking/Ultimate Emergency Braking (Ref. AMM TASK 32-45-00-710-001).

Subtask 32-11-12-740-051-A

E. Examine for Leaks
(1) Examine the applicable components for leaks. Leaks are not permitted.

5. Close-up
Subtask 32-11-12-942-051-A

A. Removal of Equipment
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the SAFETY BARRIER(S).
(3) Remove the WARNING NOTICE(S).
(4) Remove the ground support and maintenance equipment, the special and standard tools and all other items.

[Rev.10 from 2021] 2026.04.01 12:31:53 UTC