Cleaning of the Nose Landing Gear

TASK 32-21-00-100-002-A
Cleaning of the Nose Landing Gear

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: MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING GEAR. THIS WILL PREVENT UNWANTED MOVEMENT OF THE LANDING GEAR, AND THUS POSSIBLE INJURY TO PERSONS AND DAMAGE TO THE AIRCRAFT AND/OR 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	AR	ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific	1	AIR SOURCE 0.3 TO 0.7 BAR (5 TO 10 PSI)- FILTERED, DRY
No specific	AR	BRUSH - BRISTLED
No specific	AR	COVER - WATERPROOF
No specific	1	PAINTBRUSH
No specific	AR	SAFETY BARRIER(S)
No specific	AR	SCRAPER - PLASTIC
No specific	AR	SCRAPER - WOODEN
No specific	AR	SPONGE
No specific	1	SPRAYING EQUIPMENT - LOW PRESSURE
No specific	AR	WARNING NOTICE(S)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.02ABA1)	Phosphate Ester Hydraulic Fluid-General Power - -
(Material No.02BBB9)	Mineral Hydraulic Fluid-Damper - -
(Material No.08BBB1)	Non Aqueous Cleaner-- Petroleum Based -
(Material No.12ABE2)	Corrosion Preventive Compound-Water Displacing Oily Film System
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Referenced Information

REFERENCE	DESIGNATION
TASK 12-22-32-640-002-A	Lubrication of Nose Landing Gear and 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
Chromium Surfaces of the Nose Landing Gear

3. Job Set-up
Subtask 32-21-00-860-060-A

A. Aircraft Maintenance Configuration
(1) In the cockpit, on the center pedestal, make sure that:

The free fall control handle is in the normal position.

(2) Make sure that the L/G normal control lever is set to DOWN.

Subtask 32-21-00-941-066-A

B. Safety Precautions
(1) Put a WARNING NOTICE(S) in position to tell persons not to operate the landing gear control lever.
(2) Put the SAFETY BARRIER(S) in position to prevent access to the travel ranges of the nose gear doors.

Subtask 32-21-00-010-057-A

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

Subtask 32-21-00-916-052-A

D. Installation of the Protective Coverings
(1) Put an COVER - WATERPROOF on:

The wheels and their tires
All rubber items (caps, bellows)
The sliding assemblies
The hinges
The electrical harnesses, connectors and proximity detectors
The chromium surfaces
The RVDT sensor boxes (3GC/4GC)
The nosewheel-steering deactivation electrical-box (5GC)
The nosewheel-steering hydraulic block (6GC)
The vent hole installed at the top of the shock absorber.

(a) Make sure that the covers you use give sufficient protection during the procedure to clean the NLG.

4. Procedure
Subtask 32-21-00-100-050-A

A. Cleaning of the Nose Landing Gear

CAUTION: DO NOT USE HIGH-PRESSURE SPRAYING EQUIPMENT TO CLEAN THE LANDING GEAR AND THE LANDING GEAR BAYS. IF YOU USE HIGH-PRESSURE EQUIPMENT, THIS CAN CAUSE WATER TO GO INTO ELECTRICAL EQUIPMENT.

(1) Remove mud with the SPONGE soaked in water and the SCRAPER - PLASTIC or the SCRAPER - WOODEN.
(2) Compressed air procedure:

WARNING: WHEN YOU USE COMPRESSED AIR:

USE THE CORRECT PROTECTION (FACE SHIELD OR GOGGLES)
DO NOT POINT THE AIRFLOW AT YOURSELF OR OTHER PERSONS.

LOOSE PARTICLES AND/OR HIGH PRESSURE AIR CAN CAUSE INJURY.

(a) Dry the areas where you removed mud with the AIR SOURCE 0.3 TO 0.7 BAR (5 TO 10 PSI)- FILTERED, DRY or a clean Textile-Lint free Cotton - (Material No.14SBA1) .
(3) Application of the cleaning agents:

CAUTION: MAKE SURE THAT THE CLEANING AGENTS OR SOLVENTS DO NOT GET IN OR ON :

COMPONENT PARTS
PROTECTIVE COVERS
ELECTRICAL WIRING AND CONNECTORS.

(a) Clean the NLG with Non Aqueous Cleaner-- Petroleum Based - (Material No.08BBB1) . Use one of the items that follow to clean the NLG:

The SPONGE
A clean Textile-Lint free Cotton - (Material No.14SBA1)
The BRUSH - BRISTLED
The SPRAYING EQUIPMENT - LOW PRESSURE.
Start the cleaning from top of the NLG.

(4) Dry the NLG with the AIR SOURCE 0.3 TO 0.7 BAR (5 TO 10 PSI)- FILTERED, DRY or a clean Textile-Lint free Cotton - (Material No.14SBA1) .
(5) Use the PAINTBRUSH or SPRAYING EQUIPMENT - LOW PRESSURE to apply Corrosion Preventive Compound-Water Displacing Oily Film System (Material No.12ABE2) on the areas where the corrosion preventive compound was removed during the cleaning procedure.
(6) Lubricate the items that you have cleaned (Ref. AMM TASK 12-22-32-640-002).

Subtask 32-21-00-100-051-A

B. Clean the Chromium Surfaces

Chromium Surfaces of the Nose Landing Gear

(1) Remove the covers that you put on the chromium surfaces of the NLG.
(2) Clean the chromium surfaces with a clean Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-- Petroleum Based - (Material No.08BBB1) .

NOTE: It is not recommended to use Non Aqueous Cleaner-- Petroleum Based - (Material No.08BBB1) to clean the chromium surface of the NLG sliding tube. If necessary, use only a clean Textile-Lint free Cotton - (Material No.14SBA1) to clean the NLG sliding tube.

(a) If Non Aqueous Cleaner-- Petroleum Based - (Material No.08BBB1) is used to clean the chromium surface of the NLG sliding tube:

Restore the NLG sliding tube with a clean Textile-Lint free Cotton - (Material No.14SBA1) made moist with Mineral Hydraulic Fluid-Damper - - (Material No.02BBB9) .

(3) Apply the hydraulic fluid as follows:
(a) Do not apply Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) to the chromium surface of the NLG sliding tube.
(b) Put a small quantity of Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) on a clean Textile-Lint free Cotton - (Material No.14SBA1) .
(c) Apply a thin layer of Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) only to the chromium surfaces of:

The NLG gear actuating-cylinder
The NLG downlock actuator.

Subtask 32-21-00-916-053-A

C. Removal of the protective coverings
(1) Remove the protective coverings.

5. Close-up
Subtask 32-21-00-410-057-A

A. Close Access
(1) Close the NLG doors (Ref. AMM TASK 32-22-00-410-001).

Subtask 32-21-00-942-064-A

B. Removal of Equipment
(1) Remove the access platform.
(2) Remove the warning notice(s).
(3) Remove the safety barriers

[Rev.10 from 2021] 2026.04.01 00:41:58 UTC