MLG Door (LH) Does Not Close Fully or Slow to Operate

TASK 32-31-00-810-860-A
MLG Door (LH) Does Not Close Fully or Slow to Operate

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

LH MLG door retraction system components
LH MLG door clearance
LH MLG door uplock unit and rollers
LH MLG door forward and aft fittings
UPLOCK ASSY-MLG DOOR, L [2521GM]
2523GM
BYPASS VALVE-MLG DOOR GROUND OPENING, L [2517GM]
[41GA]
MANIFOLD ASSY-L/G AND DOOR SELECTOR VALVES [2524GM]

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
TSM TASK 32-31-00-810-898-A	L/G - All Landing Gears and all Landing Gear Doors Slow Operation
AMM 32-12-00-710-002	Operational Test of the Main Landing Gear (MLG) Doors Ground-Opening-Mechanism
AMM 32-12-11-400-001	Installation of the Door Assembly - Main
AMM 32-31-00-200-001	Detailed Inspection of Gear Uplock and Door Uplock Units and Rollers
AMM 32-31-00-200-003	Detailed Inspection of Retraction Actuator
AMM 32-31-00-210-002	General Visual Inspection of L/G Extension/Retraction System Components
AMM 32-31-00-720-002	Functional Test of the Normal Extension and Retraction of the Landing Gear
AMM 32-31-13-000-001	Removal of the MLG Door Ground-Opening Bypass-Valve
AMM 32-31-13-400-001	Installation of the MLG Door Ground-Opening Bypass-Valve
AMM 32-31-31-000-001	Removal of the Selector-Valve Manifold Assembly
AMM 32-31-31-400-001	Installation of the Selector-Valve Manifold Assembly
AMM 32-31-33-000-001	Removal of the MLG Door Uplock 2520GM
AMM 32-31-33-400-002	Installation of the MLG Door Uplock 2520GM
AMM 32-31-34-000-001	Removal of the Landing-Gear (L/G) Door Selector Valve
AMM 32-31-34-400-001	Installation of the Landing-Gear (L/G) Door Selector Valve
AMM 32-31-35-000-001	Removal of the MLG Door Actuating-Cylinder
AMM 52-81-00-200-001	Detailed Inspection of MLG Door, Forward and Aft Fittings, LH/RH

3. Fault Confirmation
Subtask 32-31-00-860-092-A

A. Test
(1) Do a check of the Post Flight Report:

if two CFDS L L/G DOOR CLOSED PROX SNSR TGT POS messages related to the same door, for the same flight are shown
or
if the ECAM WARNING, DOORS NOT CLOSED message with two CFDS L L/G DOOR CLOSED PROX SNSR TGT POS messages related to the same door are shown
or
if the MLG door was difficult to open on the ground.

(a) Do the fault isolation procedure in para 4.A.

4. Fault Isolation
Subtask 32-31-00-810-118-A

A. Procedure
(1) Do the detailed inspection of the LH MLG door retraction system components AMM 32-31-00-200-003 and AMM 32-31-00-210-002.
(2) Do a check of the LH MLG door clearance AMM 32-12-11-400-001.
(3) Do the detailed inspection of the LH MLG door uplock unit and rollers AMM 32-31-00-200-001.
(4) Do the detailed inspection of the LH MLG door forward and aft fittings AMM 52-81-00-200-001.
(5) Correct all the faults that you find.
(6) Do the Functional Test of the Normal Extension and Retraction System AMM 32-31-00-720-002.
(7) If the MLG doors close in the correct time but do not uplock:
(a) Replace the UPLOCK ASSY-MLG DOOR, L [2521GM] AMM 32-31-33-000-001 and AMM 32-31-33-400-002.
(8) If the fault continues:
(a) Operate the MLG doors 10 times. Use the Ground Door Opening handle AMM 32-12-00-710-002.

NOTE: This will bleed the door open/close hydraulic system.

(9) If the fault continues:
(a) Replace the 2523GM AMM 32-31-35-000-001 and AMM 32-31-35-000-001.
(10) If the fault continues:
(a) Replace the BYPASS VALVE-MLG DOOR GROUND OPENING, L [2517GM] AMM 32-31-13-000-001 and AMM 32-31-13-400-001.
(11) If the fault continues:
(a) Replace the [41GA] AMM 32-31-34-000-001 and AMM 32-31-34-400-001.
(b) Replace the MANIFOLD ASSY-L/G AND DOOR SELECTOR VALVES [2524GM] AMM 32-31-31-000-001 and AMM 32-31-31-400-001.
(12) If the fault continues:
(a) Do the TSM task (Ref. TSM TASK 32-31-00-810-898).

5. Close-up
Subtask 32-31-00-942-060-A

A. Put the aircraft back to its initial configuration.
(1) Make sure that the work area is clean and clear of tools and other items.

[Rev.8 from Aug 2018] 2026.04.04 04:31:24 UTC