- if the gap is correct, do step (3).
「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 A201
May 01/05 CES (2) Do the test in Para. 3.A.:
- if the fault continues, do step (3).
R (3) Do an inductance check of the applicable proximity sensors, (Ref. AMM R TASK 32-31-73-820-008):
- if the inductances are correct, do step (4)
- if an inductance is not correct, do step (5)
(4) At the applicable proximity sensor, release the electrical connector:
(a) Use a multimeter to do a check of the resistance between pins A and B of the applicable sensor, (Ref. ASM 32-31/03) or (Ref. ASM 32-31/04). The resistance must be approximately 13 ohms.
(b) Connect the pins A and B together.
(c) Connect one test lead of a 50VDC isolation tester to the pins AB and the other lead to the case.
(d) Supply a test signal for 5 seconds and do a check of the resistance value. The resistance must be more than 400 megohms.
(e) From the resistance checks in steps (a) and (d):
- if the two resistance values are correct, do step (6)
- if one of the two resistance values is not correct, do step (5).
(5) Replace the unserviceable shock-absorber proximity-sensor:
- for the MLG shock absorber proximity sensors (20GA, 21GA, 22GA, 23GA), (Ref. AMM TASK 32-31-73-000-001) and (Ref. AMM TASK 32-31-73-400-001)
- for the NLG shock absorber proximity sensors (24GA, 25GA), (Ref. AMM TASK 32-31-73-000-005) and (Ref. AMM TASK 32-31-73-400-005).
(a) Do the test in Para. 3.A.:
- if the fault continues, do step (6).
(6) Replace the applicable LGCIU-1 (5GA1) or LGCIU-2 (5GA2), (Ref. AMM TASK 32-31-71-000-001) and (Ref. AMM TASK 32-31-71-400-001)
(a) Do the test in Para. 3.A.:
- if the fault continues, do step (7).
(7) Do a check and repair as necessary the aircraft wiring between the applicable proximity sensor and the related LGCIU.
(a) Do the test in Para. 3.A.
TASK 32-31-00-810-843
LGCIU - EFCS Reports Loss of Data from LGCIU 1 Bus 2
1. Possible Causes
_______________
- LGCIU-1 (5GA1)
- SEC-2 (1CE2)
- SEC-3 (1CE3)
- aircraft wiring
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION
-------------------------------------------------------------------------------
AMM 27-94-34-000-001 Removal of the SEC (1CE1,1CE2,1CE3)
AMM 27-94-34-400-001 Installation of the SEC (1CE1,1CE2,1CE3)
AMM 27-96-00-740-001 BITE Test of the EFCS (Ground Scanning)
AMM 32-31-71-000-001 Removal of the LGCIU (5GA1, 5GA2)
AMM 32-31-71-400-001 Installation of the LGCIU (5GA1, 5GA2)
AWM 27-92-52
AWM 27-92-54
AWM 32-61-05
3. Fault Confirmation
__________________
A. Test
(1) Do a check of the Post Flight Report (PFR) to see if other systems have also identified the same fault.
NOTE : If other systems also identify the same loss of data, the
____ fault will be in the LGCIU, or the bus wiring which is the same for all those systems. If only one system has identified the loss of data, the fault will be in that system or the wiring which is applicable to that system only.
(2) Do the BITE test of the EFCS (Ground Scanning) (Ref. AMM TASK 27-96-00-740-001):
- if the message NO FAULTS RECORDED is shown, no other maintenance work is necessary
- if the message LGCIU1-BUS2 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 A203
May 01/05R
CES 4. Fault Isolation
_______________
A. Procedure
(1) Interchange the LGCIU-1 with the LGCIU-2 (Ref. AMM TASK 32-31-71-000-001), (Ref. AMM TASK 32-31-71-400-001).
(a) Do the test in Para. 3.A.(2):
- if the fault continues, do step (3)
- if the fault goes, do the next step.
(2) Install the LGCIUs in their initial locations and replace the LGCIU-1 (5GA1).
(a) Do the test in Para. 3.A.(2):
- if the fault continues and has been identified by other systems, do step (5)
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(41)
