(3) Refer to (Ref. AMM TASK 32-31-73-000-001) Figure 401/TASK 32-31-73-991-001, and find the applicable proximity sensor 08GA and/or 10GA.
(4) Release the electrical connector for the BITE shown failed proximity sensor.
NOTE : If the ELDEC proximity sensor test unit is available, go to
____ page block 301 and do the procedure in table 5.
(5) Use a Multimeter and do a check of the resistance between the pins A and B of the proximity sensor, (Ref. ASM 32-31/03) (Ref. ASM 32-31/04) the resistance must be approximately 13ohms.
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(6) On the proximity sensor do a check of the circuit isolation.
(a) Connect the pins A and together.
(b) Connect one test lead of the 50Vdc Isolation Tester to the pins AB and the other test lead to the case.
(c) Supply a test signal for 5 seconds and read the resistance value shown.
(d) The resistance value must be more than 400Megohms.
(7) If the proximity sensor 08GA or (10GA) fails one of the two tests at Para.4.A.(5) or (6) replace the unserviceable proximity sensor (Ref. AMM TASK 32-31-73-000-001) (Ref. AMM TASK 32-31-73-400-001).
(8) If the tests at Para.4.A.(5) and (6) are satisfactory then do a check of the aircraft wiring between the PROX SNSR 32GA (34GA) electrical connector and LGCIU-1 (2) ARINC tray Ref. ASM 323103S01 (Ref. ASM 32-31/04)
(9) If there is a circuit/interface fault do the repair.
(10) Do the L/G BITE test as in Para.3.A.(1).
(11) If no fault is found at Para.4.A.(8), replace the LGCIU-1 (5GA1) or LGCIU-2 (5GA2) (Ref. AMM TASK 32-31-71-000-001) (Ref. AMM TASK 32-31-71-400-001).
(12) Do the GROUND SCANNING and make sure that the ground log is clear.
5. Close-up
________
A. Put the aircraft back to its initial configuration.
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CES
TASK 32-31-00-810-826
LLG Uplock Proximity Sensor Fault (09GA, 11GA)
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
_______________
- LGCIU-1 (5GA1)
- LGCIU-2 (5GA2)
- MLG uplock (2509GM) is incorrectly greased
- proximity sensor 09GA and/or 11GA
- aircraft wiring
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific Multimeter
No specific 50Vdc Isolation Tester
B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
ASM 323103S01
ASM 323103S01004
ASM 323104S01
ASM 323204S01
AMM 12-22-32-640-001 Lubrication of the MLG and Doors
AMM 32-12-00-010-001 Open the Main Gear Doors for Access
AMM 32-31-71-000-001 Removal of the LGCIU (5GA1, 5GA2)
AMM 32-31-71-400-001 Installation of the LGCIU (5GA1, 5GA2)
AMM 32-31-73-000-001 Removal of the Proximity-Sensors 9GA(8GA),
11GA(10GA), 27GA(26GA), 29GA(28GA), 15GA(14GA), 17GA(16GA), 21GA(20GA), 23GA(22GA), 33GA(32GA), 35GA(34GA)
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本文链接地址：A320 Trouble Shooting Manual 排故手册 起落架 LANDING GEAR 1(26)
