4. Fault Isolation
_______________
A. If only the first test gives the maintenance message AFS: FMGC1/ATHR DISC CKT:
- 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 ATH INST DISC NO discrete (from the FMGC 1 (1CA1) to the A/THR instinctive disconnect relays (5CA1 and 5CA2)) (Ref. ASM 22-31/01).
B. If only the second test gives the maintenance message AFS: FMGC1/ATHR DISC CKT:
- 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 of the wiring of the ATH INST DISC NC (from the FMGC 1 (1CA1) to the A/THR 2 instinctive disconnect relay (5CE2)) (Ref. ASM 22-31/01).
(a) If there is no continuity:
- repair the above wiring.
(b) If there is continuity:
- do a check and repair the wiring between the A/THR instinctive disconnect relays (5CA1 and 5CA2) from 5CE1 pin A/5 to 5CE2 pin A/C (Ref. ASM 22-31/01) .
C. If the two tests give the maintenance message AFS: FMGC1/ATHR DISC CKT:
- 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 GND FILTERED discrete (from the FMGC 1 (1CA1) to the A/THR 1 instinctive disconnect relay (5CA1)) (Ref. ASM 22-31/01).
D. Do the tests 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 ∞∞22-83-00∞∞∞∞∞∞∞∞∞∞Page 236
Nov 01/00R
CES Loss of the Reception of the ATH INST DISC Discretes by the FMGC 2
1. Possible Causes
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- FMGC-2 (1CA2)
- wiring of the ATH INST DISC NO discrete (from the FMGC 2 (1CA2) to the A/THR instinctive disconnect relays (5CA1 and 5CA2))
- wiring of the ATH INST DISC NC (from the FMGC 2 (1CA2) to the A/THR 2 instinctive disconnect relay (5CE2))
- wiring between the A/THR instinctive disconnect relays (5CA1 and 5CA2)
- wiring of the GND FILTERED discrete (from the FMGC 2 (1CA2) to the A/THR 1 instinctive disconnect relay (5CA1))
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION
-------------------------------------------------------------------------------
AMM 22-83-34-000-001 Removal of the FMGC (1CA1,1CA2)
AMM 22-83-34-400-001 Installation of the FMGC (1CA1,1CA2)
AMM 22-96-00-710-001 Operational Test of the AFS
ASM 22-31/01
3. Fault Confirmation
__________________
A. Test
(1) On the FCU, make sure that the A/THR pushbutton switch is pushed.
(2) Do the operational tests of the AFS (Ref. AMM TASK 22-96-00-710-001) and read the result for the FMGC 2:
(a) with one A/THR instinctive disconnect pushbutton switch pushed (on the throttle control levers).
(b) with the two A/THR instinctive, disconnect pushbuttons switches released.
「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 ∞∞22-83-00∞∞∞∞∞∞∞∞∞∞Page 237
Nov 01/00R
CES
4. Fault Isolation
_______________
A. If only the first test gives the maintenance message AFS: FMGC2/ATHR DISC CKT:
- 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 ATH INST DISC NO discrete (from the FMGC 2 (1CA2) to the A/THR instinctive disconnect relays (5CA1 and 5CA2)) (Ref. ASM 22-31/01).
B. If only the second test gives the maintenance message AFS: FMGC2/ATHR DISC CKT:
- 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 ATH INST DISC NC (from the FMGC 2 (1CA2) to the A/THR 2 instinctive disconnect relay (5CE2)) (Ref. ASM 22-31/01).
(a) If there is no continuity:
- repair the above wiring.
(b) If there is continuity:
- do a check and repair the wiring between the A/THR instinctive disconnect relays (5CA1 and 5CA2) from 5CE1 pin A/7 to 5CE2 pin A/D (Ref. ASM 22-31/01) .
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