L/G - All Landing Gears and all Landing Gear Doors Slow Operation

TASK 32-31-00-810-898-A
L/G - All Landing Gears and all Landing Gear Doors Slow Operation

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

LGCIU-1 [5GA1]
LGCIU-2 [5GA2]
hydraulic leaks
[41GA]
MANIFOLD ASSY-L/G AND DOOR SELECTOR VALVES [2524GM]
[40GA]
SAFETY VALVE-L/G SYS ISOLATION [49GA]
CUT OUT VALVE-L/G FREE FALL [2515GM]
aircraft wiring

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
TSM TASK 32-31-00-810-856-A	NLG Doors Do Not Open Fully
TSM TASK 32-31-00-810-857-A	MLG Door (LH) Does Not Open Fully
TSM TASK 32-31-00-810-858-A	MLG Door (RH) Does Not Open Fully
TSM TASK 32-31-00-810-859-A	NLG Doors Do Not Close Fully or Slow to Operate
TSM TASK 32-31-00-810-860-A	MLG Door (LH) Does Not Close Fully or Slow to Operate
TSM TASK 32-31-00-810-861-A	MLG Door (RH) Does Not Close Fully or Slow to Operate
ESPM 2053000
AMM 29-00-00-280-001	Check of the Internal Leakage of the Green Hydraulic System
AMM 31-32-00-860-009	Procedure to Get Access to the SYSTEM REPORT/TEST/L/G Page
ASM 323100
AMM 32-31-00-710-002	Operational Test of the Landing Gear Doors (With False Targets)
AMM 32-31-00-710-005	Operational Check to Ensure Safety Valve Closes at 260 knots
AMM 32-31-00-720-002	Functional Test of the Normal Extension and Retraction of the Landing Gear
AMM 32-31-12-000-001	Removal of the Landing-Gear (L/G) Selector Valve
AMM 32-31-12-400-001	Installation of the Landing-Gear (L/G) Selector Valve
AMM 32-31-17-000-001	Removal of the Landing Gear Safety-Valve
AMM 32-31-17-400-001	Installation of the Landing Gear Safety-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 32-31-32-000-001	Removal of the Manifold Assembly
AMM 32-31-32-400-001	Installation of the Manifold Assembly
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 32-31-71-000-001	Removal of the LGCIU
AMM 32-31-71-400-001	Installation of the LGCIU
AMM 32-33-12-000-001	Removal of the L/G Free-Fall Cutout-Valve
AMM 32-33-12-400-001	Installation of the L/G Free-Fall Cutout-Valve
TSM TASK 32-31-00-03	NORMAL EXTENSION AND RETRACTION - TASK SUPPORTING DATA

3. Fault Confirmation
Subtask 32-31-00-700-059-A

A. Test

NOTE: The messages that follow can be shown if the landing gear free-fall system has been used:

L/G DOORS NOT CLOSED
L/G GEAR NOT UPLOCKED
CFDS fault message 323173 R L/G DOOR CLOSED PROX SNSR 27GA TGT POS.
If one or more of these messages are shown when the free-fall system has been used:
Find the cause of the free-fall system use and troubleshoot this problem first.

(1) If the PFR shows the ECAM message(s):

L/G GEAR NOT DOWNLOCKED
and/or
L/G GEAR NOT UPLOCKED
and/or
and/or
L/G DOORS NOT CLOSED.

(a) Do a check of the PFR for Green hydraulic or landing gear extension/retraction related faults:
1 If a fault is found:
a Correct the fault and go to step (b).
2 If no fault is found:
a Continue the troubleshooting procedure.
(b) Get access to the troubleshooting data from the LGCIUs:
1 Get access to the SYSTEM REPORT/TEST/L/G page AMM 31-32-00-860-009.
2 On the MCDU, at the LGCIU main menu:
a Press the TROUBLE SHOOT DATA line key.
b Press the NEXT PAGE key to go to the flight TSD.
c Make a record of the fault code(s) shown.
3 Troubleshoot the fault code(s) shown that occurred on the last flight 32-31-00-03 TSM TASK 32-31-00-03.
4 If a fault code refers to this task:
a Go to Para. A. of Fault Isolation.
5 If there is no information related to the last flight:
a Continue the troubleshooting procedure.
(2) Do the Operational Test of the Landing Gear Doors AMM 32-31-00-710-002 or AMM 32-31-00-710-002. The time taken for the doors to travel from fully open to fully closed must be less than 3 seconds:
(a) If all the doors operate correctly:
1 Do the Functional Test of the Normal Extension and Retraction System AMM 32-31-00-720-002:
a If the doors operate correctly but the gears are slow to operate:

Go to Para. B. of Fault Isolation, step (3).

(b) If the fault is with only one door:
1 Do the applicable procedure:
a For an NLG door, do the applicable TSM procedure:

b For an MLG door, do the applicable TSM procedure:

(c) If all the doors do not operate correctly:
1 Do a check of the System Display (Wheel Page). Make sure that all the doors show fully open:
a If all the doors do not show fully open:

Go to Para. B. of Fault Isolation.

4. Fault Isolation
Subtask 32-31-00-810-161-A

A. If a fault code referred to this TSM task:
(1) Replace the LGCIU-1 [5GA1] or the LGCIU-2 [5GA2] related to the fault message AMM 32-31-71-000-001 and AMM 32-31-71-400-001.
(2) Do the test(s) given in the Para. Fault Confirmation.

Subtask 32-31-00-810-162-A

B. If all the doors do not show fully open, or if the fault continues:
(1) If all the doors did not operate correctly:
(a) Do a check for internal leakage of the Green hydraulic system AMM 29-00-00-280-001:
1 If you find hydraulic leaks :
a Do the procedure AMM 29-00-00-280-001 to identify faulty component(s). Replace the faulty component(s).
b Do the test(s) given in the Para. Fault Confirmation.
(2) If the fault continues:
(a) Replace the [41GA] AMM 32-31-34-000-001 and AMM 32-31-34-400-001.
(b) Do the test(s) given in the Para. Fault Confirmation.
(3) If the fault continues:
(a) Replace the MANIFOLD ASSY-L/G AND DOOR SELECTOR VALVES [2524GM] AMM 32-31-31-000-001 AMM 32-31-32-000-001 and AMM 32-31-31-400-001 AMM 32-31-32-400-001.
(b) Do the test(s) given in the Para. Fault Confirmation.
(4) If the fault continues:
(a) Replace the [40GA] AMM 32-31-12-000-001 and AMM 32-31-12-400-001.
(b) Do the test(s) given in the Para. Fault Confirmation.
(5) If the fault continues:
(a) Do the Operational Check of the SAFETY VALVE-L/G SYS ISOLATION [49GA] AMM 32-31-00-710-005. Make sure that the safety valve opens at less than 260 knots:
1 If the safety valve does not operate correctly:
a Replace the SAFETY VALVE-L/G SYS ISOLATION [49GA] AMM 32-31-17-000-001 and AMM 32-31-17-400-001.
b Do the test(s) given in the Para. Fault Confirmation.
(6) If the fault continues:
(a) Replace the CUT OUT VALVE-L/G FREE FALL [2515GM] AMM 32-33-12-000-001 and AMM 32-33-12-400-001.
(b) Do the test(s) given in the Para. Fault Confirmation.
(7) If the fault continues:
(a) Do a check of the aircraft wiring between the:

LGCIU-1 [5GA1] , connector AA pin 1D and the [41GA] , connector A, pin E
LGCIU-1 [5GA1] , connector AA pin 1C and the [41GA] , connector A, pin C
LGCIU-1 [5GA1] , connector AA pin 1A and the [41GA] , connector A, pin B
LGCIU-1 [5GA1] , connector AA pin 1B and the [41GA] , connector A, pin F
ASM 323100.

(b) Do a check of the aircraft wiring between the:

LGCIU-2 [5GA2] , connector AA, pin 1D and the [41GA] , connector B, pin E
LGCIU-2 [5GA2] , connector AA, pin 1C and the [41GA] , connector B, pin C
LGCIU-2 [5GA2] , connector AA, pin 1A and the [41GA] , connector B, pin B
LGCIU-2 [5GA2] , connector AA, pin 1B and the [41GA] , connector B, pin F
ASM 323100.

(c) Repair all the unserviceable wiring and connectors ESPM 2053000.
(8) Do the Functional Test of the Normal Extension and Retraction System AMM 32-31-00-720-002.
(9) If the fault continues:
(a) Do a check of the aircraft wiring between the:

LGCIU-1 [5GA1] , connector AA, pin 1G and the [40GA] , connector A, pin B
LGCIU-1 [5GA1] , connector AA, pin 1H and the [40GA] , connector A, pin C
LGCIU-1 [5GA1] , connector AA, pin 1K and the [40GA] , connector A, pin D
LGCIU-1 [5GA1] , connector AA, pin 1J and the [40GA] , connector A, pin E
ASM 323100.

(b) Do a check of the aircraft wiring between the:

LGCIU-2 [5GA2] , connector AA, pin 1G and the [40GA] , connector B, pin B
LGCIU-2 [5GA2] , connector AA, pin 1H and the [40GA] , connector B, pin C
LGCIU-2 [5GA2] , connector AA, pin 1K and the [40GA] , connector B, pin D
LGCIU-2 [5GA2] , connector AA, pin 1J and the [40GA] , connector B, pin E
ASM 323100.

(c) Repair all the unserviceable wiring and connectors ESPM 2053000.
(d) Do the test(s) given in the Para. Fault Confirmation.
(10) If the fault continues:

NOTE: The subsequent steps are to find if the cause of the fault is the LGCIU-1 [5GA1] or the LGCIU-2 [5GA2] .

(a) Remove the LGCIU-2 [5GA2] AMM 32-31-71-000-001.
(b) Do the Functional Test of the Normal Extension and Retraction System AMM 32-31-00-720-002:
1 If the landing gear operates correctly:
a Install a new LGCIU-2 [5GA2] AMM 32-31-71-400-001.
b Do the Functional Test of the Normal Extension and Retraction System AMM 32-31-00-720-002.
2 If the landing gear does not operate correctly:
a Continue the troubleshooting procedure.
(c) Interchange the LGCIU-1 [5GA1] with the LGCIU-2 [5GA2] . Do not install the LGCIU-1 [5GA1] in this step:
1 Remove the LGCIU-1 [5GA1] AMM 32-31-71-000-001.
2 Install the LGCIU-2 [5GA2] AMM 32-31-71-400-001 in the LGCIU-1 [5GA1] position.

NOTE: The LGCIU-1 [5GA1] is not installed as it can be the source of the fault.

(d) Do the Functional Test of the Normal Extension and Retraction System AMM 32-31-00-720-002:
1 If the landing gear operates correctly:
a Put the LGCIU-2 [5GA2] in the correct position AMM 32-31-71-000-001 and AMM 32-31-71-400-001.
b Install a new LGCIU-1 [5GA1] AMM 32-31-71-400-001.
c Do the Functional Test of the Normal Extension and Retraction System AMM 32-31-00-720-002.

5. Close-up
Subtask 32-31-00-942-063-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 04:40:15 UTC