B. If the test gives the maintenance message for the FMGC 2 only:
 AFS: FMGC2/FCU (FW DISC2):

 - replace the FMGC-2 (1CA2) (Ref. AMM TASK 22-83-34-000-001) and (Ref. AMM TASK 22-83-34-400-001).
 (1) If the fault continues:
 - do a check of the wiring of the FCU OWN HLTY discrete from the FMGC 2 (1CA2) to the first terminal block (Ref. ASM 22-85/04).
 (a) If there is no continuity:

 - repair the above wiring.

 (b) If there is continuity:

 - do a check and repair the wiring of the FCU OWN FAIL discrete from the FMGC 2 (1CA2) to the FCU (2CA) (Ref. ASM 22-85/04).
 C. If the test gives the maintenance message for the FMGC 1 only:
 AFS: FMGC1/FCU (FW DISC2):

 - replace the FMGC-1 (1CA1) (Ref. AMM TASK 22-83-34-000-001) and (Ref. AMM TASK 22-83-34-400-001).
 (1) If the fault continues:
 - do a check and repair the wiring of the FCU OPP HLTY discrete from the FMGC 1 (1CA1) to the first terminal block (Ref. ASM 22-85/04).
 D. If the test gives the maintenance message for the two FMGCs:
 AFS: FMGC1/FCU (FW DISC2) and
 AFS: FMGC2/FCU (FW DISC2):
 - open the circuit breaker (10CA2)
 - open the circuit breaker (9CA2)

 - after 5 seconds, close the circuit breaker (9CA2)

 - do the operational test of the AFS (Ref. AMM TASK 22-96-00-710-001) and read the result for the FMGC 1.

 (1) If the test gives the maintenance message AFS: FMGC1/FCU (FW DISC2):

 - replace the FCU (2CA) (Ref. AMM TASK 22-81-12-000-001) and (Ref. AMM TASK 22-81-12-400-001).
 (a) If the fault continues:
 - do a check and repair the wiring of the FCU 2 HLTY discrete from the FCU (2CA) to the first terminal block (Ref. ASM 22-85/04).

 (2) If the test does not give the maintenance message AFS: FMGC1/FCU (FW DISC2):

 - replace the FMGC-2 (1CA2) (Ref. AMM TASK 22-83-34-000-001) and (Ref. AMM TASK 22-83-34-400-001).
 (a) If the fault continues:
 - do a check of the wiring of the FW OWN HLTY discrete from the FMGC 2 (1CA2) to the first terminal block (Ref. ASM 22-85/04).
 「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 ∞∞22-81-00∞∞∞∞∞∞∞∞∞∞Page 216
 Feb 01/98 CES

 1_ If there is no continuity:
 - repair the above wiring.
 2_ If there is continuity:
 - do a check and repair the wiring of the FCU OWN FAIL
 discrete from the FMGC 2 (1CA2) to the FCU (2CA) (Ref. ASM

 22-85/04).
 E. Do the test given in Para. 3.

 FCU Inoperative
 1. Possible Causes
_______________
 - FCU (2CA)
 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 22-81-12-000-001 Removal of the FCU (2CA) AMM 22-81-12-400-001 Installation of the FCU (2CA) AMM 22-96-00-710-001 Operational Test of the AFS
 3. Fault Confirmation
__________________
 A. Test
 (1) Do the operational test of the AFS (Ref. AMM TASK 22-96-00-710-001) and read the result for the FMGC 1.
 4. Fault Isolation
_______________
 A. If the test gives the maintenance message AFS : FCU (APPR NOT ENGAGED):
 - replace the FCU (2CA) (Ref. AMM TASK 22-81-12-000-001) and (Ref. AMM TASK 22-81-12-400-001).

 MULTIPURPOSE CONTROL AND DISPLAY UNIT (MCDU) - FAULT ISOLATION PROCEDURES
_________________________________________________________________________
 TASK 22-82-00-810-801
 Loss of the Power Supply of the MCDU 1
 1. Possible Causes
_______________
 - MCDU-1 (3CA1)

 - wiring of the 115VAC signal from the circuit breaker 11CA1 to the MCDU 1 (3CA1)

 - wiring of the ground signal at MCDU 1 (3CA1)

 - C/B-AUTO FLT/MCDU/1 (11CA1)

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 22-70-00-710-001 Operational Test of the Multipurpose Control and
 Display Unit (MCDU) 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) ASM 22-84/02
 3. Fault Confirmation
　
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