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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)

 「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 297
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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).
　
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