- wiring

 - C/B-AUTO FLT/MCDU/3 (11CA3)

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 22-82-12-000-001 Removal of the MCDU (3CA1,3CA2,3CA3)
 AMM 22-82-12-400-002 Installation of the MCDU (3CA1,3CA2,3CA3)
 AMM 31-32-00-740-003 Ground Scanning of the CFDIU
 AMM 32-31-71-000-001 Removal of the LGCIU (5GA1, 5GA2)
 AMM 32-31-71-400-001 Installation of the LGCIU (5GA1, 5GA2)
 ASM 22-84/02
 ASM 32-31/05
 ASM 32-62/01

 3. Fault Confirmation
__________________
 A. Test Do the ground scanning of the CFDIU (Ref. AMM TASK 31-32-00-740-003).
 4. Fault Isolation
_______________
 A. If the test gives the maintenance message MCDU3 and the circuit breaker (11CA3) is closed:
 - do a check for 115VAC at the MCDU3 (3CA3).
 (1) If there is 115VAC:

 - replace the MCDU-3 (3CA3) (Ref. AMM TASK 22-82-12-000-001) and (Ref. AMM TASK 22-82-12-400-002).

 (2) If there is no 115VAC:

 - replace the RELAY-L/G POSITION, SYS1 (11GB).
 (a) If the fault continues:
 - replace the LGCIU-1 (5GA1) (Ref. AMM TASK 32-31-71-000-001) and (Ref. AMM TASK 32-31-71-400-001).
 「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 ∞∞31-32-00∞∞∞∞∞∞∞∞∞∞Page A266
 May 01/05R CES

 1 If the fault continues:
_

 - replace the RELAY-GND SERVICE BUS CHG OVER (53GA).
 a If the fault continues:
_

 - do a check of the wiring from the relay (11GB): . pin A/C1 to MCDU3 (3CA3) pin A/40 . pin A/C2 to the circuit breaker (11CA3) . pin A/X1 to relay (53GA) pin A/B2 . pin A/X2 to LGCIU (5GA1) pin AB/1.
 * If there is no continuity:
 repair the related wiring.

 * If there is continuity:
 replace the C/B-AUTO FLT/MCDU/3 (11CA3) (Ref. ASM 22-84/02) (Ref. ASM 32-31/05) (Ref. ASM 32-62/01).

 B. If the test gives the maintenance message MCDU3 and the circuit breaker (11CA3) is open:
 - close this circuit breaker.
 (1) If this circuit breaker trips:
 - disconnect these two units:
 MCDU3 (3CA3)
 Relay (11GB)

 - close the circuit breaker (11CA3).

 (a) If this circuit breaker stays closed:

 - connect the units one by one until the circuit breaker (11CA3) trips

 - replace the related unit: For the MCDU3 (3CA3) (Ref. AMM TASK 22-82-12-000-001) and (Ref. AMM TASK 22-82-12-400-002).

 (b) If this circuit breaker trips again:

 - do a check for a short to ground between the circuit breaker (11CA3) and the two units (Ref. ASM 22-84/02).
 1 If there is a short to ground:
_ - repair the related wiring.

 2 If there is no short to ground:
_ - replace the C/B-AUTO FLT/MCDU/3 (11CA3).

 C. Do the test given in Para. 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 ∞∞31-32-00∞∞∞∞∞∞∞∞∞∞Page A267
 May 01/05R
 CES  Loss of the Bus Output from the GPSSU1 to the CFDIU

 1. Possible Causes
_______________
 - CFDIU (1TW)

 - wiring

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 31-32-00-869-002 Procedure for Class 3 Faults Reading
 AMM 31-32-34-000-001 Removal of the CFDIU (1TW)
 AMM 31-32-34-400-001 Installation of the CFDIU (1TW)
 ASM 34-58/01

 3. Fault Confirmation
__________________
 A. Test On the CFDS MENU page, get access to the AVIONICS STATUS page (Ref. AMM TASK 31-32-00-869-002).
 4. Fault Isolation
_______________
R **ON A/C 001-004, 051-060,
 A. If the test gives the maintenance message NO GPS1:
 - replace the CFDIU (1TW) (Ref. AMM TASK 31-32-34-000-001) and (Ref. AMM TASK 31-32-34-400-001).
 (1) If the fault continues:
 - do a check and repair the wiring from CFDIU (1TW) pins AA/1F, 1G to the first terminal block (Ref. ASM 34-58/01).
　
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