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REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 32-31-73-400-005 Installation of the NLG Proximity-Sensors 12GA, 13GA, 18GA, 19GA, 24GA, 25GA, 30GA, 31GA, 37GA (36GA), 39GA (38GA)
AMM 32-31-73-820-008 Inductance Check of the Proximity Sensors/Switches ASM 32-31/03 ASM 32-31/04
3. Fault Confirmation
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A. Table of the circuit breakers used in this procedure:
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------49VU L/G/LGCIU/SYS1/NORM 1GA C09 121VU HYDRAULIC/LGCIU/SYS2 2GA Q35 121VU HYDRAULIC/LGCIU/SYS1/GRND SPLY 52GA Q34
B. Test
(1) Open the the applicable NLG doors (Ref. AMM TASK 32-22-00-010-001), or MLG door (Ref. AMM TASK 32-12-00-010-001), related to the proximity sensor shown on the Post Flight Report (PFR).
NOTE : After an adjustment has been done, it is a good procedure to
____ cycle the doors one time only. This will show if the adjustment has had the necessary effect.
(2) Do the flight configuration precautions (Ref. AMM TASK 32-00-00-860-001), and make sure that all the aircraft systems are in the ground configuration.
(3) Open the circuit breaker(s) (C/B) which supply the LGCIU in the opposite system to the proximity-sensor shown on the PFR.
- for proximity sensors, 32GA, 33GA, 36GA and 37GA, open, safety and tag the circuit breaker 2GA, to make sure LGCIU 1 controls the L/G
- for proximity sensors 34GA, 35GA, 38GA and 39GA, open, safety and tag the circuit breakers 1GA and 52GA, to make sure LGCIU 2 controls the L/G.
(4) At the ECAM Control Unit, set the WHEEL page.
(a) At the lower ECAM DU, make sure the wheel page shows that all the L/G doors are fully open:
- if the applicable door symbol is not correct, do the fault isolation procedure in Para. 4.A.
- if the fault condition shows in flight, but not on the ground, do the fault isolation procedure from Para. 4.A.(4)
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- if after maintenance work the applicable door symbol is correct, do the next step (5).
NOTE : When the L/G doors are fully open, the door symbol on the
____ wheel page is shown (amber) in a position which is more than 90 degrees from the closed position.
(5) Return the aircraft to its intial condition:
(a) Close the C/B(s) opened in step (3).
(b) Close the L/G door(s) opened in step (1), (Ref. AMM TASK 32-12-00-410-001) or (Ref. AMM TASK 32-22-00-410-001).
4. Fault Isolation
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A. procedure
(1) For the applicable proximity sensor shown on the PFR, do the Inspection of the MLG and NLG Proximity Sensor and Target Clearances, (Ref. AMM TASK 32-31-73-200-001) or (Ref. AMM TASK 32-31-73-200-002):
- if no sensor/target clearance adjustment is necessary, do step (3)
- if a sensor/target clearance is adjusted, do step (2).
(2) Do the test in Para. 3.B:
- if the fault continues do the next step.
(3) Use an inductance meter to do a check of the inductance of the applicable proximity sensor (Ref. AMM TASK 32-31-73-820-008).
- if the inductance is correct, do step (5)
- if the inductance is not correct, do step (4).
(4) Replace the applicable proximity-sensor, shown on the PFR:
- for PROX SNSR-R L/G DOOR OPEN, SYS 1 (32GA) and PROX SNSR-L L/G DOOR OPEN, SYS 1 (33GA), (Ref. AMM TASK 32-31-73-000-001) and (Ref. AMM TASK 32-31-73-400-001)
- for PROX SNSR-R L/G DOOR OPEN, SYS 2 (34GA), PROX SNSR-L L/G DOOR OPEN, SYS 2 (35GA), (Ref. AMM TASK 32-31-73-000-001) and (Ref. AMM TASK 32-31-73-400-001)
- for PROX SNSR-NLG R DOOR OPEN, SYS 1 (36GA) or PROX SNSR-NLG L DOOR OPEN, SYS 1 (37GA), (Ref. AMM TASK 32-31-73-000-005) and (Ref. AMM TASK 32-31-73-400-005)
- for PROX SNSR-NLG R DOOR OPEN, SYS 2 (38GA) or PROX SNSR-NLG L DOOR OPEN, SYS 2 (39GA), (Ref. AMM TASK 32-31-73-000-005) and (Ref. AMM TASK 32-31-73-400-005).
(5) Do the test in Para 3.B.:
- if the fault continues, do the next step.
(6) Do a check of, and repair as necessary, the aircraft wiring and connectors, between the applicable LGCIU and the proximity sensor shown on the PFR (Ref. ASM 32-31/03), or (Ref. ASM 32-31/04). 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(39)
