MLG (LH) Does Not Uplock

TASK 32-31-00-810-866-A
MLG (LH) Does Not Uplock

WARNING: MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING GEAR. MOVEMENT OF THE LANDING GEAR CAN CAUSE INJURY TO PERSONS AND DAMAGE TO THE AIRCRAFT AND/OR EQUIPMENT.

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.

1. Possible Causes

UPLOCK ASSY-MLG, L [2509GM]
proximity sensors and targets
grease contamination of the uplock proximity sensors and targets
MLG (LH) lockstay assembly
ACTG CYL-MLG, L [2503GM]

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
TSM TASK 32-31-00-810-846-A	L/G Failure of one of the uplock proximity sensors 8GA thru 13GA
AMM 32-11-00-200-001	General Visual Inspection of the Main Landing Gear
AMM 32-11-00-220-003	Detailed Dimensional Check of the MLG Lockstay Assembly
AMM 32-31-00-200-001	Detailed Inspection of Gear Uplock and Door Uplock Units and Rollers
AMM 32-31-00-720-002	Functional Test of the Normal Extension and Retraction of the Landing Gear
AMM 32-31-46-000-001	Removal of the MLG Actuating Cylinder
AMM 32-31-46-400-001	Installation of the MLG Actuating Cylinder

3. Fault Confirmation
Subtask 32-31-00-860-098-A

A. Procedure
(1) Do a check of the post flight report. If there is a SYS DISAGREE ECAM message and related MLG (LH) uplock target-position CFDS message, do the Fault Isolation procedure.

4. Fault Isolation
Subtask 32-31-00-810-124-A

A. Procedure

NOTE: The procedure that follows, gives the information necessary to identify mechanical faults related to the MLG (LH).

(1) Do the inspection/check of the main gear (LH) AMM 32-11-00-200-001.
(2) Do a check of the UPLOCK ASSY-MLG, L [2509GM] proximity sensors and targets (Ref. TSM TASK 32-31-00-810-846).
(a) If the indications are not correct during the check, do the following:
1 Do a check for grease contamination of the uplock proximity sensors and targets .
2 If there is too much grease in the area, clean off the grease and do the check in Para. 4.A. again.

NOTE: Grease contamination can cause incorrect indications.

(3) Do the detailed dimensional check of the MLG (LH) lockstay assembly AMM 32-11-00-220-003.
(4) Do the detailed inspection of the MLG (LH) uplock AMM 32-31-00-200-001.
(5) Correct all faults found.
(6) Do the functional test of the normal extension and retraction of the landing gear AMM 32-31-00-720-002.
(7) If the fault continues, the MLG (LH) is slow to operate or the fault continues after the subsequent flight, replace the ACTG CYL-MLG, L [2503GM] AMM 32-31-46-000-001 AMM 32-31-46-400-001

[Rev.8 from Aug 2018] 2026.04.04 04:40:14 UTC