Removal of the NLG Leg Assembly

TASK 32-21-11-000-003-A
Removal of the NLG Leg Assembly

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: MAKE SURE THAT THE CONTROLS AGREE WITH THE POSITION OF THE ITEMS THEY OPERATE BEFORE YOU PRESSURIZE A HYDRAULIC SYSTEM. UNWANTED MOVEMENT OF HYDRAULICALLY OPERATED ITEMS CAN CAUSE SERIOUS INJURY AND/OR DAMAGE.

WARNING: PRESSURIZE ONLY THE HYDRAULIC SYSTEM(S) THAT IS (ARE) NECESSARY FOR THE TASK. ISOLATE THE OTHER HYDRAULIC SYSTEM(S) BEFORE YOU SUPPLY HYDRAULIC POWER TO THE AIRCRAFT.

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.

ZONE: 123
ZONE: 124
ZONE: 711
FIN: 2881GM

1. Reason for the Job

NOTE: Two persons are necessary to do this task.

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	AR	CAP - BLANKING
No specific	AR	CONTAINER 5 L (1.32 USGAL)
No specific	AR	CORD - PATCH
No specific	1	HOIST 500 KG (1100 LB)
No specific	AR	PLUG - BLANKING
No specific	AR	SAFETY BARRIER(S)
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	SPATULA - NON METALLIC
No specific	1	V-BLOCK
No specific	AR	WARNING NOTICE(S)
98D32203500000	1	TOOL-R I NLG
98D32203504000	1	TROLLEY-NLG GROUND HANDLING
J47555	1	EXTRACTOR
J47556	1	EXTRACTOR
J47558	1	EXTRACTOR
M21929	2	TENSIONING FIXTURE

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
123	NOSE GEAR WELL
124	NOSE GEAR WELL
711	NOSE GEAR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 07-11-00-581-001-A	Lifting for Aircraft Maintenance Operations
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 32-21-41-000-001-A	Removal of the NLG TOWING attachment
TASK 32-22-00-010-001-A	Nose Gear Doors - Ground Doors Opening
TASK 32-22-13-010-001-A	Removal of the NLG Aft Door-Assembly for Access
TASK 32-22-15-000-001-A	Removal of the NLG Leg Door-Assembly
TASK 32-22-15-000-802-A	Removal of the Link and Fitting Assemblies of the NLG Leg Door
TASK 32-41-12-000-001-A	Removal of the NLG Wheel
TASK 32-41-12-000-002-A	Removal of the Axle Sleeve
TASK 32-49-51-000-802-A	Removal of the Non-TPIS Kit
TASK 32-49-51-000-802-A-01	Removal of the Non-TPIS Kit (EV NLG)
TASK 32-51-12-000-001-A	Removal of the Nose - Wheel Steering Electrical Deactivation - Box
TASK 32-51-15-000-001-A	Removal of the Swivel Selector Valve
TASK 32-51-42-000-802-A	Removal of the Servicing Plate Kit
TASK 32-51-51-000-001-A	Removal of the Nose-Wheel Steering Servo-Control
TASK 32-51-51-000-802-A	Removal of the Hydraulic Label Kit
TASK 33-43-11-000-001-A	Removal of the Runway Turnoff Light
TASK 33-46-11-000-001-A	Removal of the Take Off Light
TASK 33-46-12-000-001-A	Removal of the Taxi Light
Installation of the Tool
Electrical and Hydraulic Connections
Upper Connections
Lower Connection
Connection of the Rotating Rod
Connection to the Structure
Tensioning Fixture

3. Job Set-up
Subtask 32-21-11-941-062-A

A. Safety Precautions
(1) In the cockpit, on panel 400VU, put the 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 panel 40VU in the cockpit
On the ground service panel of the Green hydraulic system, access door (197CB).

(3) As necessary, use the applicable SAFETY BARRIERS, specified by the operator's instructions and your local regulations.
(4) Put the CONTAINER 5 L (1.32 USGAL) in position to collect the hydraulic fluid.
(5) Obey the applicable safety precautions before you open the LGCIU circuit breakers (Ref. AMM TASK 32-00-00-860-001).

Subtask 32-21-11-865-062-A

B. 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
** 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/BRAKING AND STEERING/SYS1/IND AND/SPLY	2GG	M33
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 32-21-11-010-054-A

C. Get Access
(1) Open the doors of the NLG (Ref. AMM TASK 32-22-00-010-001).
(2) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position in zone 123 (124).

Subtask 32-21-11-860-058-A ** ON A/C NOT FOR ALL

D. 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)
(3) Lift the aircraft on jacks (Ref. AMM TASK 07-11-00-581-001).
(4) Depressurize the NLG shock absorber from the charging valve at the top of the NLG shock absorber as follows:
(a) Remove the blanking cap from the charging valve.
(b) Slowly open the charging valve by one and a half turns maximum.
(5) Use the SPATULA - NON METALLIC to remove sealants from the mechanical parts.

Subtask 32-21-11-860-058-B ** ON A/C NOT FOR ALL

D. Aircraft Maintenance Configuration
(1) Make sure that the Yellow 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 Yellow hydraulic system.
(Ref. AMM TASK 29-14-00-614-001)
(3) Lift the aircraft on jacks (Ref. AMM TASK 07-11-00-581-001).
(4) Depressurize the NLG shock absorber from the charging valve at the top of the NLG shock absorber as follows:
(a) Remove the blanking cap from the charging valve.
(b) Slowly open the charging valve by one and a half turns maximum.
(5) Use the SPATULA - NON METALLIC to remove sealants from the mechanical parts.

4. Procedure
Subtask 32-21-11-020-061-C ** ON A/C NOT FOR ALL

A. Preparation of the NLG before Removal
(1) Remove the NLG aft door-assembly (Ref. AMM TASK 32-22-13-010-001).
(2) Remove the NLG leg door-assembly (Ref. AMM TASK 32-22-15-000-001).
(3) Remove the link and fitting assemblies of the NLG leg door (Ref. AMM TASK 32-22-15-000-802).
(4) Remove the swivel selector valve (Ref. AMM TASK 32-51-15-000-001).
(5) Remove the NLG wheels (Ref. AMM TASK 32-41-12-000-001).
(6) Remove the axle sleeve (Ref. AMM TASK 32-41-12-000-002).
(7) Remove nose-wheel steering electrical deactivation-box 5GC (Ref. AMM TASK 32-51-12-000-001).
(8) Remove taxi light 8LR (Ref. AMM TASK 33-46-12-000-001).
(9) Remove take-off light 7LR (Ref. AMM TASK 33-46-11-000-001).
(10) Remove the runway turnoff light (Ref. AMM TASK 33-43-11-000-001).
(11) Remove the NLG towing attachment (Ref. AMM TASK 32-21-41-000-001).
(12) Remove nose-wheel steering servo-control 6GC (Ref. AMM TASK 32-51-51-000-001).

Subtask 32-21-11-020-061-D ** ON A/C NOT FOR ALL

A. Preparation of the NLG before Removal
(1) Remove the NLG aft door-assembly (Ref. AMM TASK 32-22-13-010-001).
(2) Remove the NLG leg door assembly (Ref. AMM TASK 32-22-15-000-001).
(3) Remove the link and fitting assemblies of the NLG leg door (Ref. AMM TASK 32-22-15-000-802).
(4) Remove the swivel selector valve (Ref. AMM TASK 32-51-15-000-001).
(5) Remove NLG wheels 2659GM, 2660GM (Ref. AMM TASK 32-41-12-000-001).
(6) Remove nosewheel-steering electrical deactivation-box 5GC (Ref. AMM TASK 32-51-12-000-001).
(7) Remove nose-wheel steering servo-control 6GC (Ref. AMM TASK 32-51-51-000-001).
(8) Remove the axle sleeve (Ref. AMM TASK 32-41-12-000-002).
(9) Remove taxi light 8LR (Ref. AMM TASK 33-46-12-000-001).
(10) Remove take-off light 7LR (Ref. AMM TASK 33-46-11-000-001).
(11) Remove the runway turnoff light (Ref. AMM TASK 33-43-11-000-001).
(12) Remove the towing fitting (Ref. AMM TASK 32-21-41-000-001).
(13) Remove the non-TPIS kit (Ref. AMM TASK 32-49-51-000-802).
(14) Remove the servicing plate kit (Ref. AMM TASK 32-51-42-000-802).
(15) Remove the hydraulic label kit (Ref. AMM TASK 32-51-51-000-802).

Subtask 32-21-11-020-064-A

B. Disconnection of the Electrical and Hydraulic Lines

Electrical and Hydraulic Connections

(1) Remove the hydraulic lines (6) and (7). Put PLUG - BLANKING on the disconnected line ends.
(2) Disconnect the electrical connectors (1) and (2). Put CAP - BLANKING on the disconnected electrical connectors.
(3) Remove the nuts (5), the washers (4) and the clamp (3).

Subtask 32-21-11-020-066-B

C. Disconnection of the Lock Springs

Upper Connections

Tensioning Fixture

(1) Install the M21929 TENSIONING FIXTURE on the springs (38) and (39).

WARNING: USE PROTECTIVE GOGGLES WHEN YOU REMOVE OR INSTALL A COTTER PIN. EACH TIME YOU REMOVE A COTTER PIN DURING THE TASK, DISCARD IT IMMEDIATELY. A LOOSE COTTER PIN CAN CUT YOU OR MAKE YOU BLIND.

(2) Remove the cotter pins (35) and (42) and discard them.
(3) Remove the nuts (36) and (41).
(4) Remove the washers (37) and (40).
(5) Disconnect the lock springs (38) and (39).

Subtask 32-21-11-020-065-B

D. Disconnection of the Downlock Release Actuator and the Lockstay Assembly

Upper Connections

(1) Disconnect the hydraulic lines (25) and (26) and put PLUG - BLANKING on the disconnected line ends.
(2) Remove and discard the cotter pin (27).
(3) Remove the nut (28) and washer (29).
(4) Disconnect the downlock release actuator (24) from the shaft (31).
(5) Remove and discard the cotter pin (45).
(6) Remove the nut (46), washer (47), bolt (20) and washer (21).
(7) Remove the bush (48).
(8) Remove the ring (22).
(9) Disconnect the spherical end of the actuating cylinder (23).

NOTE: Attach the actuating cylinder (23) to the structure with a CORD - PATCH.

(10) Remove the pin (32) with the J47558 EXTRACTOR.
(11) Remove the washer (44) and spacer (33).
(12) Disengage the lockstay assy (43).

Subtask 32-21-11-020-067-A

E. Disconnection of the Drag Strut (66)

Lower Connection

(1) Remove and discard the cotter pin (63). Remove the nut (62), the washer (61) and the bolt (65).
(2) Remove the ring (64).

CAUTION: PUSH THE NOSE GEAR LEG TO THE FRONT TO PREVENT DAMAGE TO THE ROTATING CONTROL RODS OF THE REAR NOSE LANDING GEAR DOORS.

(3) Put a V-BLOCK below the nose landing gear shock absorber to keep the nose landing gear leg at an angle.
(4) Remove the hinge pin (60) with the J47555 EXTRACTOR.
(5) Disconnect the drag strut (66).

Subtask 32-21-11-020-063-B

F. Disconnection of the Rotating Rods

Connection of the Rotating Rod

WARNING: USE PROTECTIVE GOGGLES WHEN YOU REMOVE OR INSTALL A COTTER PIN. EACH TIME YOU REMOVE A COTTER PIN DURING THE TASK, DISCARD IT IMMEDIATELY. A LOOSE COTTER PIN CAN CUT YOU OR MAKE YOU BLIND.

(1) Remove and discard the cotter pins (71).
(2) Remove the nuts (70), the washers (76) and the bolts (74).
(3) Remove the bushes (75) and (72).
(4) Disengage the trunnion shafts (73) and remove the rotating rods.
(a) Push the nose gear leg forward to disengage the trunnion shafts (73).

Subtask 32-21-11-480-051-B

G. Installation of the Tool

Installation of the Tool

Upper Connections

Lower Connection

(1) Install the pin (32),the ring (22), the bolt (20), the washers (21) and (47) and the nut (46).
(a) Do not tighten or safety the nut (46).
(2) Install the bush (48) into the ring (22).
(3) Install the hinge pin (60), ring (64), bolt (65), washer (61) and nut (62).
(a) Do not tighten or safety the nut (62).
(4) Install the 98D32203500000 TOOL-R I NLG.
(5) Install a HOIST 500 KG (1100 LB) on the 98D32203500000 TOOL-R I NLG.
(6) Put the 98D32203504000 TROLLEY-NLG GROUND HANDLING in position below the NLG leg.
(7) Put the HOIST cable in tension.

Subtask 32-21-11-020-062-A

H. Removal of the NLG Leg Assy

Connection to the Structure

(1) Remove and discard the cotter pins (85). Remove the nuts (84), the washers (83) and the bolts (96).
(2) Remove the grease duct (81), the trunnion pin (95) and the bushing (80) with the J47556 EXTRACTOR. Remove the washers (86).
(3) Disengage the NLG leg (97) from the spherical bearings.
(4) Attach the NLG leg (97) to the 98D32203504000 TROLLEY-NLG GROUND HANDLING and disconnect the cable of the HOIST.

[Rev.10 from 2021] 2026.04.01 00:41:59 UTC