(1) Do the fault isolation.
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4. Fault Isolation
_______________
A. Procedure
(1) Swap the LGCIU-1 with LGCIU-2 (Ref. AMM TASK 32-31-71-000-001) (Ref. AMM TASK 32-31-71-400-001), but DO NOT do the installation test.
(2) Do the operational test Of the L/G doors (Ref. AMM TASK 32-31-00-710-002).
(a) During the L/G doors operational test, if the fault moves to the LGCIU-2 (1) position, the fault is in LGCIU-1 (2).
(b) If the fault stays in the LGCIU-1 electrical circuit, go to Para. 4.A.(4)>
(3) Install the LGCIU-1 and 2 in their initial locations and replace the faulty LGCIU-1 (5GA1) LGCIU-2 (5GA2) Refer to Para. 4.(1)and (2).
(a) Do a check of the UPPER ECAM and make sure that the fault warning clears.
(b) Do the GROUND SCANNING and make sure that the ground log is clear.
(4) During the procedure in Para. 4.(2)(a), if the fault stays in the LGCIU-1 (2) electrical circuit, replace the LEVER-L/G NORM CTL (6GA) (Ref. AMM TASK 32-31-11-000-001) (Ref. AMM TASK 32-31-11-400-001).
(5) If the fault does not clear do a check of the 28Vdc supply from the LEVER-L/G NORM CTL (6GA) to the ARINC tray connecter for LGCIU-1 (2) (Ref. ASM 323105S01) (Ref. ASM 323106S01).
(6) If there is a circuit fault do a wiring/connector repair and do the operational test of the L/G doors (Ref. AMM TASK 32-31-00-710-002)
(7) Do the GROUND SCANNING and make sure that the ground log is clear.
5. Close-up
________
A. Remove the ground support and maintenance equipment, the special and standard tools and all other items.
B. Put the aircraft back to its initial configuration.
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TASK 32-31-00-810-812
NLG Shock Absorber Fault (L/G will not retract).
WARNING : MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING
_______ GEAR.
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.
1. Possible Causes
_______________
- 24GA
- 25GA
- NLG SHOCK ABSORBER
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 12-14-32-614-004 Check Shock Absorber Charge Pressure AMM 32-21-00-200-002 General Visual Inspection of the Nose Landing Gear AMM 32-21-13-000-001 Removal of the NLG Shock Absorber Assy AMM 32-21-13-400-001 Installation of the NLG Shock Absorber Assy AMM 32-31-00-720-003 Functional Test of the Normal Extension and
Retraction of the Nose Landing Gear
AMM 32-31-73-400-005 Installation of the NLG Proximity-Sensors 12GA, 13GA, 18GA, 19GA, 24GA, 25GA, 30GA, 31GA, 37GA (36GA), 39GA (38GA)
3. Fault Confirmation
__________________
A. Procedure.
(1) If this fault has occurred on the ground, make sure that the aircraft nose does not have too much height. This could be caused by the aircraft center of gravity in the AFT position.
(a) Make sure the aircraft center of gravity is correct before you do the fault isolation.
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(2) No maintenance steps are necessary if this fault has occurred:
- during flight phase 8
- during taxi on a snow covered runway NOTE : In these conditions the radio altimeter can show non computed
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