(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 proximity sensor 28WV fails one of the two (2) test at Para.4.A.(2) or (3), replace the unserviceable proximity sensor(Ref. AMM TASK 52-71-12-000-001) (Ref. AMM TASK 52-71-12-400-001).
(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.
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞32-31-00∞∞∞∞∞∞∞∞∞∞Page 272
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5. Close-up
________
A. Put the aircraft back to its initial configuration.
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞32-31-00∞∞∞∞∞∞∞∞∞∞Page 273
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CES TASK 32-31-00-810-831 Cargo Door (Aft) Handle Proximity Sensor Fault (34WV) WARNING : MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING
_______ GEAR.
1. Possible Causes
_______________
- LGCIU-1 (5GA1)
- PROX SW-HANDLE, AFT CARGO COMPT DOOR (34WV)
- aircraft wiring
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific Multimeter No specific 50 VDC Isolation Tester
B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION
-------------------------------------------------------------------------------
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 52-71-12-000-001 Removal of the Proximity Switches 28WV and 34WV AMM 52-71-12-400-001 Installation of the Proximity Switches 28WV and 34WV ASM 31-54/05
3. Fault Confirmation
__________________
A. Test
(1) Do a BITE test of the LGCIU-1 (Ref. AMM TASK 32-69-00-740-001).
(2) If the failure message AFT CARGO DOOR HANDLE PROX SNSR 34WV is shown, do the fault isolation procedure in Para. 4.A.
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞32-31-00∞∞∞∞∞∞∞∞∞∞Page 274
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CES
4. Fault Isolation
_______________
A. Procedure
(1) Interchange the LGCIU 1 with LGCIU 2, (Ref. AMM TASK 32-31-71-000-001) and (Ref. AMM TASK 32-31-71-400-001).
(a) If the fault goes, put the LGCIUs back to their initial positions and replace the LGCIU-1 (5GA1).
(b) If the fault continues, do the next step. NOTE : The aft cargo door handle proximity switch is connected
____ only to the LGCIU 1 position.
(2) Get access to the PROX SW-HANDLE, AFT CARGO COMPT DOOR (34WV) (Ref. AMM TASK 52-71-12-000-001).
(a) If the ELDEC proximity sensor test unit is available:
- do the procedure given in Page Block 301, Para. 6.
(b) If the ELDEC proximity sensor test unit is not available:
- do the next step.
(c) Release the electrical connector from the proximity sensor 34WV.
(d) Use a Multimeter and do a check of the resistance between the pins A and B of the proximity sensor (Ref. ASM 31-54/05):
- the resistance value must be approximately 13 ohms.
(e) Connect the pins A and B together.
(f) Use a 50 VDC Isolation Tester to do a circuit isolation check between the pins AB and the case of the isolation tester, which must be at ground potential:
- the resistance value must be more than 400 Megohms.
(g) Connect the connector disconnected in step (c). 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：A320 Trouble Shooting Manual 排故手册 起落架 LANDING GEAR 1(31)
