Functional Check of the MLG Door Actuating Cylinder

TASK 32-31-00-720-803-A
Functional Check of the MLG 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.

ZONE: 734
ZONE: 744

1. Reason for the Job
Refer to the MPD TASK: 323105-04
FUNCTIONAL CHECK OF THE MLG DOOR ACTUATING CYLINDER.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	SAFETY BARRIER(S)
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
734	MAIN DOOR
744	MAIN DOOR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 12-34-24-869-002-A	Aircraft Grounding (Earthing) for the Maintenance Operations
TASK 24-41-00-862-002-A	De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01	De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02	De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
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 32-31-00-710-002-A	Operational Test of the Landing Gear Doors (With False Targets)
TASK 32-31-00-710-002-A-01	Operational Test of the Landing Gear Doors (Without False Targets)
TASK 32-31-35-000-001-A	Removal of the MLG Door Actuating-Cylinder
TASK 32-31-35-400-001-A	Installation of the MLG Door Actuating-Cylinder
MLG Door Actuator
LG Door Actuating-Cylinder - Defect Report Sheet

3. Job Set-up
Subtask 32-31-00-941-100-A

A. Safety Precautions
(1) Make sure that the aircraft is electrically grounded (Ref. AMM TASK 12-34-24-869-002).
(2) As necessary, use the applicable SAFETY BARRIERS, specified by the operator's instructions and your local regulations.
(3) On panel 400VU:

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

(4) Put WARNING NOTICE(S) adjacent to the landing gear doors to tell persons not to go near the landing gear doors.

Subtask 32-31-00-860-143-A

B. Aircraft Maintenance Configuration
(1) Make sure that the aircraft electrical circuits are de-energized
(Ref. AMM TASK 24-41-00-862-002).
(2) Make sure the MLG doors are closed (Ref. AMM TASK 32-12-00-410-001).

4. Procedure
Subtask 32-31-00-720-081-A

WARNING: MAKE SURE THAT THE TRAVEL RANGES OF THE LANDING GEAR DOORS ARE CLEAR.

A. Functional Check of the MLG Door Actuating-Cylinder

ACTION	RESULT
1.Move the applicable ground door-operating handle to the OPEN position (Ref. AMM TASK 32-12-00-010-001). Wait for 30 seconds.	The related MLG door moves to the fully open position The applicable MLG door actuating-cylinder is vertical.
2.Make sure that the movement of the MLG door actuating-cylinder is smooth and continuous.
3.Move the MLG door with your hand through approximately 30 degrees and back to the fully open position.	The movement of the MLG door actuating-cylinder must be smooth and continuous. There must be hydraulic resistance only.
4.Measure the dimension (DIM A) with the MLG door fully opened.	The dimension (DIM A) must not be less than 385 mm (15.16 in.).

(1) If there is a defect:

Replace the applicable MLG door actuating-cylinder before the next flight (Ref. AMM TASK 32-31-35-000-001) (Ref. AMM TASK 32-31-35-400-001)
Record the applicable data in the defect report sheet and send to AIRBUS.
LG Door Actuating-Cylinder - Defect Report Sheet

Subtask 32-31-00-710-067-A

B. Operational Test
(1) Do the operational test of the MLG doors (Ref. AMM TASK 32-31-00-710-002).

5. Close-up
Subtask 32-31-00-410-084-A

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

Subtask 32-31-00-942-104-A

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

[Rev.10 from 2021] 2026.04.01 00:44:03 UTC