1. Possible Causes
_______________
 - LGCIU-2 (5GA2)

 - 12MJ

 - 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 523501S01
 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 52-35-13-000-002 Removal of the Proximity Switches 5MJ and/or 12MJ AMM 52-35-13-400-002 Installation of the Proximity Switches 5MJ and 12MJ
 3. Fault Confirmation
__________________
 A. Message Analysis.
 (1) Do a BITE test on the LGCIU-2 (Ref. AMM TASK 32-69-00-740-001)
 (a) Access LGCIU 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
____
 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 285
 May 01/05R CES

 (2) Do the fault isolation.

 4. Fault Isolation
_______________
 A. Cargo Compartment Control.
 (1) The proximity sensor 12MJ is installed above the locking shaft of the AFT cargo compartment door.
 (a) Refer to (Ref. AMM TASK 52-35-13-000-002) Figure 402/TASK 52-35-13-991-002 for the Proximity Sensor 12MJ location.

 (b) Refer to Detail A and Detail B and find the Proximity Sensor 12MJ

 (c) Release the electrical connector for 12MJ. 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 523501S01) 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.

 (c) Supply a test signal for 5 seconds and read the resistance value shown.

 (d) The resistance value must be more than 400Megohms.

 (4) If the proximity sensor 12MJ fails one of the two (2) test at Para.4.A.(2) or (3) replace the unserviceable proximity sensor(Ref. AMM TASK 52-35-13-000-002) (Ref. AMM TASK 52-35-13-400-002).

 (5) If the tests at Para.4.A.(2) and (3) are satisfactory then do a check of the aircraft wiring between the applicable proximity sensor electrical connector and the LGCIU- 1 (2) ARINC tray

 (6) If there is no continuity repair the wiring/interface.

 (7) Do the L/G BITE test as in Para.3.A.(1).

 (8) If no fault is found at Para.4.A.(5), replace the LGCIU-2 (5GA2) (Ref. AMM TASK 32-31-71-000-001) (Ref. AMM TASK 32-31-71-400-001).

 (9) Do the GROUND SCANNING and make sure that the ground log is clear.

 「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 286
 May 01/05R CES

 5. Close-up
________
 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 287
 May 01/05R
 CES

 TASK 32-31-00-810-836

 L/G Selector Valve Fault.
 WARNING : MAKE SURE THAT THE TRAVEL RANGES OF THE FLIGHT CONTROL SURFACES ARE

_______
 CLEAR BEFORE YOU PRESSURIZE/DEPRESSURIZE A HYDRAULIC SYSTEM.

 WARNING : MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING
_______
 GEAR.

 1. Possible Causes
_______________
　
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