Installation of the NLG Torque-Tube Assembly

TASK 32-33-18-400-801-A
Installation of the NLG Torque-Tube Assembly

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

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	AR	SAFETY BARRIER(S)
No specific	1	WARNING NOTICE(S)
No specific	2	WEDGE - NON METALLIC
98A32301000000	2	RIGGING PIN
98D32203502000	AR	SAFETY PIN - NLG DOOR

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.03GBB1)	Synthetic Oil base Grease-General Purpose Clay Thickened -
(Material No.03HBD9)	Synthetic Ester base Grease-General Purpose Low Temp -
(Material No.12ACB1)	Corrosion Preventive Compound-Heavy Duty Hard Film -

C. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
11	COTTER PIN	AIPC 32-33-01-08-010
20	COTTER PIN	AIPC 32-33-01-08-010
6	COTTER PIN	AIPC 32-33-01-08-010

D. Referenced Information

REFERENCE	DESIGNATION
TASK 24-42-00-861-001-A	Energize the Ground Service Network from the External Power
TASK 24-42-00-862-001-A	De-energize the Ground Service Network Supplied from the External Power
TASK 32-00-00-081-001-A	Removal of the Safety Devices from the Landing Gears
TASK 32-00-00-481-001-A	Installation of the Safety Devices on the Landing Gears
TASK 32-00-00-481-002-A	Installation of the Safety Devices on the Landing Gear Doors
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
TASK 32-33-00-720-004-A	Functional Test of the NLG Free-Fall Extension
Rigging Pins Location
NLG Torque-Tube Assembly

3. Job Set-up
Subtask 32-33-18-861-050-A

A. Make sure that the ground service network is energized
(Ref. AMM TASK 24-42-00-861-001).

Subtask 32-33-18-941-051-A

B. Safety Precautions

Rigging Pins Location

(1) Make sure that the SAFETY BARRIER(S) are in position.
(2) Make sure that the ground safety locks are on the landing gear (Ref. AMM TASK 32-00-00-481-001).
(3) On right-center instrument panel 400VU:

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

(4) On rudder/trim parking-brake panel 110VU, make sure that the WEDGE - NON METALLIC is installed on each side of the gravity gear extension-handle (1), to lock it in position.

Subtask 32-33-18-010-051-A

C. Get Access
(1) Make sure that the NLG doors are open (Ref. AMM TASK 32-22-00-010-001).
(2) Make sure that a 98D32203502000 SAFETY PIN - NLG DOOR is installed in each NLG door (Ref. AMM TASK 32-00-00-481-002).
(3) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position.

Subtask 32-33-18-865-051-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
121VU	HYDRAULIC/LGCIU/SYS2	2GA	Q35
121VU	HYDRAULIC/LGCIU/SYS1/GRND SPLY	52GA	Q34

4. Procedure
Subtask 32-33-18-480-050-A

A. Installation of the Rigging Pins

Rigging Pins Location

(1) Make sure that the 98A32301000000 RIGGING PIN is installed in location PIN 1.
(a) Make sure that the door-uplock input lever is locked.
(2) Make sure that the 98A32301000000 RIGGING PIN is installed in location PIN 2.
(a) Make sure that the bellcrank is locked.

Subtask 32-33-18-420-050-A

B. Installation of the NLG Torque-Tube Assembly

NLG Torque-Tube Assembly

(1) Do an inspection of the component interface and/or the adjacent area.
(2) Make sure that the surfaces of the brackets are in a good condition.
(3) If removed, install the rear bearing assembly (2).
(a) Put the rear bearing assembly (2) in position.
(b) Install the bolts (3) and the nuts (1).
(c) Tighten the nuts (1).
(4) Apply a thin layer of Synthetic Oil base Grease-General Purpose Clay Thickened - (Material No.03GBB1) or Synthetic Ester base Grease-General Purpose Low Temp - (Material No.03HBD9) on the two ends of the torque tube assembly (8).
(5) Put the rear end of the torque tube assembly (8) in position through the rear bearing assembly (2).
(6) Put the forward end of the torque tube assembly (8) in position through the bracket.
(7) Put the forward bearing assembly (14) in position.
(8) Install the bolts (9) and the nuts (10).
(9) Tighten the nuts (10).
(10) Install the washer (13) and the nut (12).
(11) Tighten the nut (12).
(12) Safety the nut (12) with a new AIPC 32-33-01-08-010 COTTER PIN (11).
(13) If removed, put the shouldered bushings (16) and (18) in position.
(14) Connect the rod (17) to the forward end of the torque tube assembly (8).
(15) Install the bolt assembly (15), washer (19) and nut (21).
(16) Tighten the nut (21).
(17) Safety the nut (21) with a new AIPC 32-33-01-08-010 COTTER PIN (20).
(18) If removed, put the shouldered bushings (22) and (24) in position.
(19) Connect the rod (23) to the rear end of the torque tube assembly (8).
(20) Install the bolt assembly (4), washer (5) and nut (7).
(21) Tighten the nut (7).
(22) Safety the nut (7) with a new AIPC 32-33-01-08-010 COTTER PIN (6).
(23) Apply Corrosion Preventive Compound-Heavy Duty Hard Film - (Material No.12ACB1) on the nuts (12), (10) and (1).

Subtask 32-33-18-860-050-A

C. Aircraft Maintenance Configuration

Rigging Pins Location

(1) Remove the 98A32301000000 RIGGING PIN from locations PIN 1 and PIN 2.
(2) On rudder/trim parking-brake panel 110VU:
(a) Remove the WEDGE - NON METALLIC from each side of the gravity gear extension-handle (1).

5. Close-up
Subtask 32-33-18-865-052-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
121VU	HYDRAULIC/LGCIU/SYS2	2GA	Q35
121VU	HYDRAULIC/LGCIU/SYS1/GRND SPLY	52GA	Q34

Subtask 32-33-18-410-050-A

B. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the access platform(s).
(3) Close the NLG doors (Ref. AMM TASK 32-22-00-410-001).

Subtask 32-33-18-720-050-A

C. Test

CAUTION: MAKE SURE THAT THE RIGGING PINS ARE REMOVED BEFORE OPERATION OF THE FREE FALL SYSTEM. DAMAGE WILL OCCUR IF THE RIGGING PINS ARE INSTALLED DURING SYSTEM OPERATION.

(1) Do a functional test of the free-fall extension system (Ref. AMM TASK 32-33-00-720-004).

Subtask 32-33-18-942-050-A

D. Removal of Equipment
(1) Remove the ground safety locks from the landing gear (Ref. AMM TASK 32-00-00-081-001).
(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.

Subtask 32-33-18-862-050-A

E. De-energize the ground service network
(Ref. AMM TASK 24-42-00-862-001).

[Rev.10 from 2021] 2026.04.01 00:46:49 UTC