Installation of the NLG Door Opening Restrictor Valve

TASK 32-31-57-400-001-A
Installation of the NLG Door Opening Restrictor Valve

ZONE: 123
FIN: 2535GM

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	ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE
No specific	AR	CONTAINER 5 L (1.32 USGAL)
No specific	AR	SAFETY BARRIER(S)
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 1.83 and 1.51 m.daN (13.50 and 11.14 lbf.ft )
No specific	Torque wrench: range to between 2.39 and 1.97 m.daN (17.63 and 14.53 lbf.ft )

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
123	NOSE GEAR WELL

C. Referenced Information

REFERENCE	DESIGNATION
TASK 12-12-29-611-001-A	Fill the Hydraulic Fluid Reservoir with a Hand Pump
TASK 12-12-29-611-002-A	Fill the Hydraulic Fluid Reservoir with a Hydraulic Service Cart
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 32-22-00-010-001-A	Nose Gear Doors - Ground Doors Opening
TASK 32-22-00-410-001-A	Nose Gear Doors - Ground Doors Closing
Restrictor Valve

3. Job Set-up
Subtask 32-31-57-860-050-A

A. Aircraft Maintenance Configuration
(1) Make sure that the Green hydraulic system is depressurized and put it in the maintenance configuration.
(Ref. AMM TASK 29-00-00-864-001)
(2) Make sure that the reservoir of the Green hydraulic system is depressurized (Ref. AMM TASK 29-14-00-614-001).
(3) In the cockpit, on the panel 400VU, make sure that the WARNING NOTICE(S) is (are) in position to tell persons not to operate the landing gear control lever.
(4) Make sure that the WARNING NOTICE(S) is (are) in position to tell persons not to pressurize the Green hydraulic system:

on the panel 40VU in the cockpit,
on the ground service panel of the Green hydraulic system, access door (197CB).

(5) Make sure that the SAFETY BARRIER(S) are in position.
(6) Make sure that the doors of the nose landing gear are open (Ref. AMM TASK 32-22-00-010-001).
(7) Make sure that the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE is in position in zone 123.
(8) Make sure that the CONTAINER 5 L (1.32 USGAL) is in position below the restrictor valve (2535GM) to collect the hydraulic fluid leakage.

4. Procedure
Subtask 32-31-57-420-050-A

A. Installation of the Restrictor Valve
(1) Remove the blanking plug and install the restrictor valve (2) on the hydraulic line (1).
(2) TORQUE the restrictor valve (2) (inlet connection) to between 1.83 and 1.51 m.daN (13.50 and 11.14 lbf.ft )

.
(3) Remove the blanking plug and connect the hydraulic line (3) to the restrictor valve (2).
(4) TORQUE the union (3) (outlet connection) to between 2.39 and 1.97 m.daN (17.63 and 14.53 lbf.ft )

Subtask 32-31-57-942-051-A

B. Preparation for the Test
(1) Remove the container.
(2) Remove the access platform(s).

Subtask 32-31-57-720-050-A

C. Functional Test
(1) Close the NLG doors (Ref. AMM TASK 32-22-00-410-001).
(2) Open the NLG doors (Ref. AMM TASK 32-22-00-010-001).
(3) Make sure that there is no hydraulic fluid leakage from the restrictor valve (2535GM).
(4) If necessary fill the reservoir of the Green hydraulic system to the correct level (Ref. AMM TASK 12-12-29-611-001) or (Ref. AMM TASK 12-12-29-611-002).

5. Close-up
Subtask 32-31-57-410-050-A

A. Close Access
(1) Remove the WARNING NOTICE(S).
(2) Make sure that the work area is clean and clear of tools and other items.
(3) Close the nose gear doors (Ref. AMM TASK 32-22-00-410-001).

[Rev.10 from 2021] 2026.04.01 00:45:46 UTC