Removal of the NLG Uplock Assy

TASK 32-31-21-000-001-A
Removal of the NLG Uplock Assy

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.

ZONE: 124
FIN: 2530GM

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	CAP - BLANKING
No specific	AR	CONTAINER 5 L (1.32 USGAL)
No specific	AR	PLUG - BLANKING
No specific	AR	SAFETY BARRIER(S)
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
124	NOSE GEAR WELL

C. Referenced Information

REFERENCE	DESIGNATION
TASK 29-00-00-864-001-A	Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action
TASK 29-14-00-614-001-A	Depressurization of the Hydraulic Reservoirs
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 32-22-00-010-001-A	Nose Gear Doors - Ground Doors Opening
NLG Uplock Assy ** ON A/C NOT FOR ALL
NLG Uplock Assy ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 32-31-21-860-050-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) Depressurize the reservoir of the Green hydraulic system
(Ref. AMM TASK 29-14-00-614-001)

Subtask 32-31-21-010-050-A

B. Get Access
(1) Open the doors of the nose landing gear (Ref. AMM TASK 32-22-00-010-001).
(2) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position in zone 123.

Subtask 32-31-21-941-050-A

C. Safety Precautions
(1) In the cockpit, on the panel 400VU, put WARNING NOTICE(S) in position to tell persons not to operate the landing gear control lever.
(2) Put the WARNING NOTICE(S) 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).

(3) Put the SAFETY BARRIER(S) in position.
(4) Put a CONTAINER 5 L (1.32 USGAL) in position below the NLG uplock assy (2530GM).
(5) Obey the applicable safety precautions before you open the LGCIU circuit breakers (Ref. AMM TASK 32-00-00-860-001).

Subtask 32-31-21-865-050-A

D. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	L/G/LGCIU/SYS1/NORM	1GA	C09
121VU	HYDRAULIC/LGCIU/SYS2	2GA	Q35
121VU	HYDRAULIC/LGCIU/SYS1/GRND SPLY	52GA	Q34

4. Procedure
Subtask 32-31-21-020-052-A ** ON A/C NOT FOR ALL

A. Removal of the NLG Uplock Assy

WARNING: MAKE SURE THAT THE NLG DOWNLOCK SAFETY PIN AND THE TWO DOOR SAFETY PINS ARE INSTALLED.

(1) Disconnect the electrical connectors (8) and (9) and put CAP - BLANKING on the disconnected ends.
(2) Disconnect the hydraulic lines (10) and (11) and put PLUG - BLANKING on the disconnected ends.
(3) Remove and discard the cotter pin (27). Remove the nut (26) and the washer (25)
(4) Remove the screw (20) and disconnect the rod (23).
(5) Remove and discard the cotter pin (13). Remove the nut (14), the washer (15) and the screw (17).
(6) Remove the lever (16).
(7) Remove and discard the cotter pins (3) and (4). Remove the nuts (2) and (5) and the washers (1) and (6).
(8) Remove the screws (28) and (29), the uplock assy (12) and the washers (7).

Subtask 32-31-21-020-052-B ** ON A/C NOT FOR ALL

A. Removal of the NLG Uplock Assy

WARNING: MAKE SURE THAT THE NLG DOWNLOCK SAFETY PIN AND THE TWO DOOR SAFETY PINS ARE INSTALLED.

[Rev.10 from 2021] 2026.04.01 04:10:49 UTC