4. Fault Isolation
_______________
A. Procedure
(1) Interchange the LGCIUs (Ref. AMM TASK 32-31-71-000-001) and (Ref. AMM TASK 32-31-71-400-001).
NOTE : This will cause each LGCIU to get a new identification.
____
(2) Do the test in Para. 3. A. (1) with the new LGCIU (1 or 2).
(3) If the test is OK (does not give the same message as shown during the initial BITE test):
(a) Replace the LGCIU-1 (5GA1) or LGCIU-2 (5GA2) used for the initial test.
(b) Make sure that the serviceable LGCIU is installed in its initial position.
(4) If the test is not OK (gives the same message as shown during the initial BITE test):
(a) Replace the applicable SENSOR-R FLAP ATTACHMENT FAILURE DETECTION (38CV) or SENSOR-R FLAP ATTACHMENT FAILURE DETECTION (40CV), (Ref. AMM TASK 27-51-15-000-002) and (Ref. AMM TASK 27-51-15-400-002).
(b) If the fault continues:
- Do a check of the aircraft wiring between the applicable proximity sensor and the related LGCIU (Ref. ASM 27-51/06) or (Ref. ASM 27-51/07)
- Do the repair
- Do the test in Para. 3. A. (1).
「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 270
May 01/05R
CES
TASK 32-31-00-810-830
Cargo Door (Fwd) Handle Proximity Sensor Fault (28WV)
WARNING : MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING
_______
GEAR.
1. Possible Causes
_______________
- LGCIU-1 (5GA1)
- 28WV
- 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 52-71-12-000-001 Removal of the Proximity Switches 28WV and 34WV AMM 52-71-12-400-001 Installation of the Proximity Switches 28WV and 34WV
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
「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 271
May 01/05R CES
(2) Do the fault isolation.
4. Fault Isolation
_______________
A. Cargo Compartment Door Control.
(1) The proximity sensor 28WV is installed in the FWD cargo door.
(a) Refer to (Ref. AMM TASK 52-71-12-000-001) Figure 401/TASK 52-71-12-991-001 for the proximity sensor 28WV location and:
(b) Refer to Detail C and find the proximity sensor 28WV
(c) release the electrical connector for the Proximity Sensor 28WV. 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. 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(30)
