(3) If one of the checks in step (2) is not OK, replace the PROX SW-HANDLE, AFT CARGO COMPT DOOR (34WV), (Ref. AMM TASK 52-71-12-000-001) and (Ref. AMM TASK 52-71-12-400-001).
(4) Do the test in Para. 3.A:
- if the fault continues do the next step.
(5) If the checks in step (2) are OK, do a check and repair the aircraft wiring between the proximity-sensor electrical-connector and the LGCIU 1 ARINC tray (Ref. ASM 31-54/05).
(6) Do the test in Para. 3.A.
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TASK 32-31-00-810-832
Cargo Door (Fwd) Safety Mechanism Proximity Sensor Fault (30WV)
WARNING : MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING
_______
GEAR.
1. Possible Causes
_______________
- LGCIU-1 (5GA1)
- 38WV
- 30WV
- 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 315400S05
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 32-69-00-740-001 BITE Check Landing Gear Control Interface Unit
(LGCIU) using MCDU to Ensure that Continuous BITE is
Operative AMM 52-71-12-000-002 Removal of the Proximity Switches 30WV and 32WV AMM 52-71-12-400-002 Installation of the Proximity Switches 30WV and 32WV
3. Fault Confirmation
__________________
A. Message Analysis.
(1) Do a BITE test on the LGCIU-1 (Ref. AMM TASK 32-69-00-740-001)
(a) Access LGCIU-1 TROUBLE SHOOTING (ground) and read the BITE test fault number(s) for fault confirmation (refer to AMM 326900 table 4).
NOTE : The table 4 shows the fault messages approximate to the
____
CFDS message
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(2) Do the fault isolation.
4. Fault Isolation
_______________
A. Cargo Compartment Control.
(1) The proximity sensor 38WV is installed in the FWD cargo door.
(a) Refer to (Ref. AMM TASK 52-71-12-000-002) Figure 402/TASK 52-71-12-991-002-A for the proximity sensor 30WV location and:
(b) Refer to Detail C and find the Proximity sensor 30WV
(c) Release the electrical connector for the BITE shonw 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.
(2) Use a Multimeter and do a check of the resistance between the pins A and B of the PROX SNSR, (Ref. ASM 315400S05) the resistance must be approximately 13ohms.
(3) On the PROX SNSR do a check of circuit isolation.
(a) Connect the pins A and B 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.
(4) If the 30WV fails one of the two (2) test at Para.4.A.(2) or (3) replace the unserviceable proximity sensor(Ref. AMM TASK 52-71-12-000-002) (Ref. AMM TASK 52-71-12-400-002).
(5) If the tests at Para.4.A.(2) and.(3) are satisfactory then do a check of the aircraft wiring between the applicable proximity sensor electrical connector and the LGCIU- 1 ARINC tray (Ref. ASM 315400S05)
(6) If there is no continuity repair the wiring/interface.
(7) Do the L/G BITE test as in Para.3.A.(1).
(8) If no fault is found at Para.4.A.(5), replace the LGCIU-1 (5GA1) (Ref. AMM TASK 32-31-71-000-001) (Ref. AMM TASK 32-31-71-400-001).
(9) Do the GROUND SCANNING and make sure that the Ground Log is clear.
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本文链接地址：A320 Trouble Shooting Manual 排故手册 起落架 LANDING GEAR 1(32)
