3. Fault Confirmation
__________________
A. Test
(1) Do the Ground Scanning of the AFS (Ref. AMM TASK 22-91-00-710-001).
4. Fault Isolation
_______________
A. If the test gives the maintenance message AFS: MCDU1 (ISSUED BY: FM1):
- 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 MCDU OWN IN bus (from the FMGC 1 (1CA1) to the first terminal block), (Ref. ASM 22-86/04).
B. If the test gives the maintenance message AFS: MCDU1 (ISSUED BY: FM2):
- 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 and repair the wiring of the MCDU OPP IN bus (from the FMGC 2 (1CA2) to the first terminal block), (Ref. ASM 22-86/04).
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 ∞∞22-82-00∞∞∞∞∞∞∞∞∞∞Page 205
Feb 01/98 CES Loss of the Power Supply of the MCDU 2
1. Possible Causes
_______________
- MCDU-2 (3CA2)
- wiring of the 115VAC signal from the circuit breaker 11CA2 to the MCDU 2 (3CA2)
- wiring of the ground signal at MCDU 2 (3CA2)
- C/B-AUTO FLT/MCDU/2 (11CA2)
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
__________________
A. Make sure that this(these) circuit breaker(s) is(are) closed:
-------------------------------------------------------------------------------
PANEL DESIGNATION IDENT. LOCATION
-------------------------------------------------------------------------------
121VU AUTO FLT/MCDU/2 11CA2 N20
B. Test
(1) Do the operational test of the multipurpose control and display unit (MCDU) (Ref. AMM TASK 22-70-00-710-001).
(a) If the circuit breaker 11CA2 is open, refer to Para. 4.B.
4. Fault Isolation
_______________
A. If the circuit breaker 11CA2 is closed and if the MCDU MENU page is not in view on the MCDU 2:
- do a check for 115VAC at MCDU 2 (3CA2).
(1) If there is 115VAC:
- replace the MCDU-2 (3CA2), (Ref. AMM TASK 22-82-12-000-001) and (Ref. AMM TASK 22-82-12-400-002).
「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 ∞∞22-82-00∞∞∞∞∞∞∞∞∞∞Page 206
Feb 01/98 CES (2) If there is no 115VAC:
- do a check of the wiring of the 115VAC signal from the circuit breaker 11CA2 to the MCDU 2 (3CA2)
- do a check of the wiring of the ground signal at MCDU 2 (3CA2) pin A/41. (Ref. ASM 22-84/02).
(a) If there is no continuity:
- repair the above wirings.
(b) If there is continuity:
- replace the C/B-AUTO FLT/MCDU/2 (11CA2).
B. If the circuit breaker 11CA2 is open:
- close the circuit breaker.
(1) If the circuit breaker is open again:
- replace the MCDU-2 (3CA2), (Ref. AMM TASK 22-82-12-000-001) and (Ref. AMM TASK 22-82-12-400-002).
(a) If the fault continues:
- do a check for a short to ground between the circuit breaker (11CA2) to the MCDU 2 (3CA2) (Ref. ASM 22-84/02).
1_ If there is a short to ground:
- repair the above wiring.
2_ If there is no short to ground:
- replace the C/B-AUTO FLT/MCDU/2 (11CA2).
C. Do the test given in Para. 3.
Failure of the MCDU 2
1. Possible Causes
_______________
- MCDU-2 (3CA2)
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
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