(3) Replace the unserviceable LGCIU-1 (5GA1) or LGCIU-2 (5GA2), which gave the maintenance message, (Ref. AMM TASK 32-31-71-000-001) and (Ref. AMM TASK 32-31-71-400-001) :

 - if the fault continues, do the next step.

 (4) Replace the applicable PROX SNSR-R L/G DOOR CLOSED, SYS 1 (26GA) or PROX SNSR-R L/G DOOR CLOSED, SYS 2 (28GA), (Ref. AMM TASK 32-31-73-000-001) and (Ref. AMM TASK 32-31-73-400-001):

 - if the fault continues, do the next step.

 (5) Do a check and repair as necessary the aircraft wiring/connectors between the applicable proximity sensor and the related LGCIU, (Ref. ASM 32-31/03) or (Ref. ASM 32-31/04).

 (6) Do the test in Para. 3. A.

 TASK 32-31-00-810-820
 LLG Door Closed Proximity Sensor Fault (27GA, 29GA)
 WARNING : MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING
_______
 GEAR.

 WARNING : PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU
_______
 START A TASK ON OR NEAR:

 - THE FLIGHT CONTROLS

 - THE FLIGHT CONTROL SURFACES

 - THE LANDING GEAR AND THE RELATED DOORS

 - COMPONENTS THAT MOVE.

 1. Possible Causes
_______________
 - LGCIU-1 (5GA1)

 - LGCIU-2 (5GA2)

 - 27GA

 - 29GA

 - 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 323103S01
 ASM 323103S01004
 ASM 323104S01
 AMM 32-12-00-010-001 Open the Main Gear Doors for Access
 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 32-31-73-000-001 Removal of the Proximity-Sensors 9GA(8GA),

 11GA(10GA), 27GA(26GA), 29GA(28GA), 15GA(14GA), 17GA(16GA), 21GA(20GA), 23GA(22GA), 33GA(32GA), 35GA(34GA)
 AMM 32-31-73-400-001  Installation of the Proximity-Sensors 9GA(8GA), 11GA(10GA), 27GA(26GA), 29GA(28GA), 15GA(14GA), 17GA(16GA), 21GA(20GA), 23GA(22GA), 33GA(32GA)...
 「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 243
 May 01/05R CES

 -------------------------------------------------------------------------------
REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 32-69-00-740-001  BITE Check Landing Gear Control Interface Unit (LGCIU) using MCDU to Ensure that Continuous BITE is Operative
 3. Fault Confirmation
__________________
 A. Message Analysis.
 (1) Do a BITE test on the LGCIU-1 (2) (Ref. AMM TASK 32-69-00-740-001)
 (a) Access LGCIU-1 (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

 (2) Do the fault isolation.
 4. Fault Isolation
_______________
 A. Procedure.
 (1) Open the L L/G Door for access to the proximity sensor (Ref. AMM TASK 32-12-00-010-001)

 (2) Refer to (Ref. AMM TASK 32-31-73-000-001) Figure 401/TASK 32-31-73-991-001, and find the proximity sensor 27GA 29GA

 (3) Release the electrical connector for the BITE shown failed proximity sensor.

 NOTE : If the ELDEC proximity sensor test unit is available. Go to
____ page block 301 and do the procedure in table 5.
 (4) Use a Multimeter and do a check of the resistance between the pins A and B of the PROX. SNSR, (Ref. ASM 323103S01004) (Ref. ASM 323104S01) the resistance must be approximately 13ohms.

 (5) On the PROX SNSR do a check of the 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.

 「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 244
　
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