- wirings of the FCU 2 A F/B and FCU 2 B F/B buses from the FCU (2CA) to the first terminal block
- wiring of the 28VDC signal from the circuit breaker (9CA1) to the FCU (2CA)
- wiring of the ground signal at the FCU (2CA)
- C/B-AUTO FLT/FCU/1 (9CA1)
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 22-91-00-710-001 Ground Scanning of the AFS
ASM 22-84/01
ASM 22-86/03
3. Fault Confirmation
__________________
A. Make sure that this(these) circuit breaker(s) is(are) closed:
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------49VU AUTO FLT/FCU/1 9CA1 B05
B. Test
(1) Do the Ground Scanning of the AFS (Ref. AMM TASK 22-91-00-710-001).
(a) If the circuit breaker (9CA1) is open, refer to Para. 4.B. of this trouble shooting procedure.
「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 202
Feb 01/98 CES
4. Fault Isolation
_______________
A. If the circuit breaker (9CA1) is closed and if the test gives the
maintenance message AFS: FCU:
- do a check for 28VDC at the FCU (2CA) pin A/Z.
(1) If there is 28VDC:
- 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 of the: . wiring of the FMGC 1 A bus from the FCU (2CA) to the first terminal block . wiring of the FCU OWN A bus from the FMGC 1 (1CA1) to the first terminal block . wiring of the FCU OWN B bus from the FMGC 1 (1CA1) to the first terminal block.
- (Ref. ASM 22-86/03).
1 If there is no continuity:
_ - repair the above wirings.
2 If there is continuity:
_
- do a check and repair the wirings of the FCU 2 A F/B and FCU 2 B F/B buses from the FCU (2CA) to the first terminal block (Ref. ASM 22-86/03).
(2) If there is no 28VDC:
- do a check of the wiring of the 28VDC signal from the circuit breaker (9CA1) to the FCU (2CA) and the wiring of the ground signal at the FCU (2CA), pin A/A (Ref. ASM 22-84/01).
(a) If there is no continuity:
- repair the above wirings.
(b) If there is continuity:
- replace the C/B-AUTO FLT/FCU/1 (9CA1).
B. If the circuit breaker (9CA1) is open:
- close this circuit breaker.
(1) If the circuit breaker trips:
- 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 for a short to ground from the circuit breaker (9CA1) to the FCU (2CA) (Ref. ASM 22-84/01).
1 If there is a short to ground:
_ - repair the above wiring.
「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 203
Feb 01/98 CES
_
- replace the C/B-AUTO FLT/FCU/1 (9CA1).
C. Do the test given in Para. 3.
FCU 2 Inoperative
1. Possible Causes
_______________
- FCU (2CA)
- wiring of the FMGC 2 A bus from the FCU (2CA) to the first terminal block
- wiring of the FCU OWN A bus from the FMGC 2 (1CA2) to the first terminal block
- wiring of the FCU OWN B bus from the FMGC 2 (1CA2) to the first terminal block
- wirings of the FCU 1 A F/B and FCU 1 B F/B buses from the FCU (2CA) to the first terminal block
- wiring of the 28VDC signal from the circuit breaker (9CA2) to the FCU (2CA)
- wiring of the ground signal at the FCU (2CA)
- C/B-AUTO FLT/FCU/2 (9CA2)
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)
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本文链接地址：A320 Trouble Shooting Manual 排故手册 AUTO FLIGHT 自动飞行2(43)
