Lubrication of Main Landing Gear Door Actuating Cylinder

TASK 12-22-32-640-004-A
Lubrication of Main Landing Gear Door Actuating Cylinder

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.

ZONE: 731
ZONE: 741
FIN: 2522GM ** ON A/C NOT FOR ALL
FIN: 2523GM ** ON A/C NOT FOR ALL

1. Reason for the Job
Refer to the MPD TASK: 321000-02
LUBRICATION OF MAIN LANDING GEAR DOOR ACTUATING CYLINDER.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 1M (3 FT)-ADJUSTABLE
No specific	1	LUBRICATING EQUIPMENT
No specific	AR	SAFETY BARRIER(S)
No specific	1	WARNING NOTICE(S)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.03GBB1)	Synthetic Oil base Grease-General Purpose Clay Thickened -
(Material No.03GBC1)	Synthetic Oil base Grease-General Purpose Lithium Thickened Low Temp. -
(Material No.03HBD9)	Synthetic Ester base Grease-General Purpose Low Temp -
(Material No.08BAA9)	Non Aqueous Cleaner-General - -
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
731	L.H MAIN GEAR
741	R.H MAIN GEAR

D. Referenced Information

REFERENCE	DESIGNATION
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 32-12-00-010-001-A	Open the Main Gear Doors for Access
TASK 32-12-00-410-001-A	Close the Main Gear Doors after Access
TASK 12-22-00-00	LUBRICATION - DESCRIPTION AND OPERATION
MLG Door Actuating-Cylinder - Lubrication Points ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 12-22-32-941-052-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) As necessary, use the applicable SAFETY BARRIERS, specified by the operator's instructions and your local regulations.
(2) Make sure that the ground safety locks are installed on the landing gear (Ref. AMM TASK 32-00-00-481-001).
(3) On panel 400VU:
(a) Make sure that the landing-gear control-lever is in the DOWN position.
(b) Put a WARNING NOTICE(S) in position to tell persons not to operate the landing gear.
(4) Put a WARNING NOTICE(S) in position to tell persons not to operate the landing gear doors.

Subtask 12-22-32-010-052-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Put the ACCESS PLATFORM 1M (3 FT)-ADJUSTABLE in position adjacent to the applicable MLG.
(2) Open the applicable MLG door (Ref. AMM TASK 32-12-00-010-001).
(3) Install the safety devices on the MLG door actuating-cylinder (Ref. AMM TASK 32-00-00-481-002).

Subtask 12-22-32-640-061-A ** ON A/C NOT FOR ALL

C. Preparation for Lubrication
(1) Make sure that the LUBRICATING EQUIPMENT is in the correct condition before you fill it.
(2) Operate the LUBRICATING EQUIPMENT to make sure that the lines and adaptor are full of new lubricant.
(3) Clean the two greasers of the MLG door actuating-cylinder (1) with a clean Textile-Lint free Cotton - (Material No.14SBA1) and Non Aqueous Cleaner-General - - (Material No.08BAA9) .

4. Procedure
Subtask 12-22-32-640-062-A ** ON A/C NOT FOR ALL

CAUTION: DO NOT OPERATE POWER-OPERATED LUBRICATION EQUIPMENT AT MORE THAN 207 bars (3000 psi). HIGH LUBRICATION PRESSURE CAN CAUSE DAMAGE TO THE AIRCRAFT.

A. Lubrication of Main Landing Gear Door Actuating-Cylinder

NOTE: For lubricant grease specification and lubrication requirements, refer to (Ref. AMM D/O 12-22-00-00).

(1) Lubricate the two greasers of the MLG door actuating-cylinder (1) with Synthetic Ester base Grease-General Purpose Low Temp - (Material No.03HBD9) or Synthetic Oil base Grease-General Purpose Clay Thickened - (Material No.03GBB1) or Synthetic Oil base Grease-General Purpose Lithium Thickened Low Temp. - (Material No.03GBC1) . Do this until new grease comes out.

NOTE: Signs of circular movement on the MLG door-actuator bearing-housing is permitted. If there are signs of lateral movement on the MLG door-actuator bearing-housing, you must replace it.

(2) Remove the unwanted grease:
(a) Clean the greasers with a clean Textile-Lint free Cotton - (Material No.14SBA1) and Non Aqueous Cleaner-General - - (Material No.08BAA9) .
(b) Make sure that the greaser ball is in the correct position.

5. Close-up
Subtask 12-22-32-410-052-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the applicable MLG door (Ref. AMM TASK 32-12-00-410-001).

Subtask 12-22-32-942-053-A ** ON A/C NOT FOR ALL

B. Removal of Equipment
(1) Remove the SAFETY BARRIERS.
(2) Remove the WARNING NOTICE(S).
(3) Remove the access platform(s).
(4) Remove the ground support and maintenance equipment, the special and standard tools and all other items.

[Rev.10 from 2021] 2026.04.02 07:24:22 UTC