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AMM 32-69-00-740-001 BITE Check Landing Gear Control Interface Unit (LGCIU) using MCDU to Ensure that Continuous BITE is Operative
3. Fault Confirmation
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A. Message Analysis.
(1) Do a BITE test on the LGCIU-1 (2) (Ref. AMM TASK 32-69-00-740-001)
(a) Access LGCIU-1 (2) 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
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CFDS message
(2) Do the fault isolation.
4. Fault Isolation
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A. Procedure.
(1) Open the N L/G Doors for access to the proximity sensor (Ref. AMM TASK 32-22-00-010-001)
(2) Refer to (Ref. AMM TASK 32-31-73-000-005) Figure 406/TASK 32-31-73-991-007, and find the proximity sensor 12GA 13GA.
(3) Release the electrical connector for the BITE shown failed proximity sensor.
NOTE : If the ELDEC proximity sensor test unit is available. Go to
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(4) Use a Multimeter and do a check of the resistance between the pins A and B of the PROXSNSR, (Ref. ASM 323103S01004) (Ref. ASM 323104S01) the resistance must be approximately 13ohms.
(5) 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.
「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 265
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(d) The resistance value must be more than 400Megohms.
(6) If the proximity sensor 12GA or 13GA fails one of the two (2) test at Para.4.A.(4) or (5) replace the unserviceable proximity sensor(Ref. AMM TASK 32-31-73-000-005) (Ref. AMM TASK 32-31-73-400-005).
(7) If the tests at Para.4.C. & 4.D. are satisfactory then do a check of the aircraft wiring between the applicable proximity sensor electrical connector and the LGCIU 1- (2) ARINC tray (Ref. ASM 323103S01) (Ref. ASM 323104S01)
(8) If there is a circuit/interface fault do the repair.
(9) Do the L/G BITE test as in Para.3.A.(1).
(10) If no fault is found at Para.4.A.(7), replace the LGCIU-1 (5GA1) LGCIU-2 (5GA2) (Ref. AMM TASK 32-31-71-000-001) (Ref. AMM TASK 32-31-71-400-001).
(11) Do the GROUND SCANNING and make sure that the ground log is clear.
5. Close-up
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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 266
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CES
TASK 32-31-00-810-828
Left Flap Disconnect Proximity Sensor (37CV, 39CV)
WARNING : MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING
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GEAR.
WARNING : PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU
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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
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- LGCIU-1 (5GA1)
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本文链接地址：A320 Trouble Shooting Manual 排故手册 起落架 LANDING GEAR 1(28)
