Installation of the Manifold Assembly

TASK 32-31-17-400-802-A
Installation of the Manifold Assembly

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: MAKE SURE THAT THE SAFETY DEVICES AND THE WARNING NOTICES ARE IN POSITION BEFORE YOU START A TASK ON OR NEAR:

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

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

WARNING: OBEY THE HYDRAULIC SAFETY PROCEDURES. WORK ON THE HYDRAULIC SYSTEMS CAN BE DANGEROUS.

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

ZONE: 744

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 2M (6 FT) - ADJUSTABLE
No specific	1	CONTAINER - HYDRAULIC FLUID RESISTANT
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 1.7 and 1.5 m.daN (12.54 and 11.06 lbf.ft )
No specific	Torque wrench: range to between 9.5 and 8.5 m.daN (70.06 and 62.68 lbf.ft )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.04SAB2)	Varnish Polyurethane-- Marking Structure

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
744	MAIN DOOR

D. Referenced Information

REFERENCE	DESIGNATION
TASK 12-12-29-611-001-A	Fill the Hydraulic Fluid Reservoir with a Hand Pump
TASK 24-41-00-861-002-A	Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01	Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02	Energize the Aircraft Electrical Circuits from 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 29-14-00-614-001-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 32-31-00-710-005-A	Operational Check to Ensure Safety Valve Closes at 260 Knots
TASK 32-31-00-710-005-A-01	Operational Check to Ensure Safety Valve Closes at 260 Knots
TASK 32-31-00-710-005-A-02	Operational Check to Ensure Safety Valve Closes at 260 Knots
TASK 32-31-00-710-013-A	Operational Check of the Safety Valve that uses the APU
TASK 32-31-00-710-013-A-01	Operational Check of the Safety Valve that uses the Aircraft Batteries
TASK 32-31-00-710-013-A-02	Operational Check of the Safety Valve that uses the GND PWR Contactor Override Box
TASK 32-31-17-400-001-A	Installation of the Landing Gear Safety-Valve
TASK 51-75-13-916-002-A	Repair to a layer of Corrosion Preventive Compound
Landing Gear Manifold-Assembly - Location and Detail

3. Job Set-up
Subtask 32-31-17-941-053-A

A. Safety Precautions
(1) 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.

(2) Make sure that the hydraulic safety procedures are obeyed (Ref. AMM TASK 29-00-00-910-002).

Subtask 32-31-17-860-055-A

B. Aircraft Maintenance Configuration
(1) Make sure that the aircraft electrical circuits are energized (Ref. AMM TASK 24-41-00-861-002)
(2) Make sure that the PTU isolation coupling is disconnected (Ref. AMM TASK 29-23-00-860-001).
(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 29-10-00-864-001).
(5) Make sure that the reservoir of the Green hydraulic system is depressurized
(Ref. AMM TASK 29-14-00-614-001).

Subtask 32-31-17-010-053-A

C. Get Access
(1) Make sure that the right MLG door is opened (Ref. AMM TASK 32-12-00-010-001).
(2) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position.
(3) Make sure that the CONTAINER - HYDRAULIC FLUID RESISTANT is below the manifold assembly (1) to collect the hydraulic fluid leakage.

Subtask 32-31-17-865-055-A

D. 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 32-31-17-420-051-A

E. 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.

4. Procedure
Subtask 32-31-17-420-052-A

A. Installation of the Manifold Assembly
(1) Put the manifold assembly (1) in position on the aircraft structure and install the washers (5) and the bolts (4).
(2) Tighten the bolts (4).
(3) Remove the PLUG-BLANKING from each disconnected line end.
(4) Connect the hydraulic unions (2), (3) and (6) to the manifold assembly (1).
(5) TORQUE the hydraulic union (2) to between 1.7 and 1.5 m.daN (12.54 and 11.06 lbf.ft )

.
(6) TORQUE the hydraulic unions (3) and (6) to between 9.5 and 8.5 m.daN (70.06 and 62.68 lbf.ft )

.
(7) Use Varnish Polyurethane-- Marking Structure (Material No.04SAB2) and paint a line across the hydraulic unions (2), (3) and (6).
(8) Install the landing gear safety-valve (Ref. AMM TASK 32-31-17-400-001).

5. Close-up
Subtask 32-31-17-865-056-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	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 32-31-17-860-056-A

B. Aircraft Maintenance Configuration
(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 ground configuration (Ref. AMM TASK 32-00-00-860-002).
(3) Remove the CONTAINER - HYDRAULIC FLUID RESISTANT.
(4) Remove the access platform(s).
(5) Remove the WARNING NOTICE(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 system to the correct level (Ref. AMM TASK 12-12-29-611-001).

Subtask 32-31-17-710-051-A

C. Test
(1) Do the operational check of the safety valve (Ref. AMM TASK 32-31-00-710-013).
(2) Do the operational check to ensure the safety-valve closes at 260 kts (Ref. AMM TASK 32-31-00-710-005).
(3) Open the right MLG door (Ref. AMM TASK 32-12-00-010-001).
(4) Make sure that there is no hydraulic fluid leakage from the manifold assembly (1).
(5) Apply corrosion preventive compound to the heads of the bolts (4) and the adjacent area (Ref. AMM TASK 51-75-13-916-002).

Subtask 32-31-17-410-052-A

D. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the right MLG door (Ref. AMM TASK 32-12-00-410-001).

Subtask 32-31-17-942-052-A

E. Removal of Equipment
(1) Remove the ground support and maintenance equipment, the special and standard tools and all other items.

[Rev.10 from 2021] 2026.04.01 00:44:37 UTC