W DOC AIRBUS | TSM A320F

Loss of the Reception of the FADEC 2 Bus by One FMGC

TASK 22-31-00-810-809-A
Loss of the Reception of the FADEC 2 Bus by One FMGC

1. Possible Causes
  • FMGC-1 [1CA1]
  • wirings of the FADEC OPP A and FADEC OPP B bus from the FMGC 1 (1CA1) to the first terminal block
  • ECU-2 [4000KS2]
  • [4000KS]
  • FMGC-2 [1CA2]
  • wirings of the FADEC OWN A and FADEC OWN B bus from the FMGC 2 (1CA2) to the first terminal block
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
AMM 22-83-34-000-001
Removal of the FMGC
AMM 22-83-34-400-001
Installation of the FMGC
ASM 228601
AMM 22-91-00-710-001
Ground Scanning of the AFS
AMM 24-41-00-861-002
Energize the Aircraft Electrical Circuits from the External Power
AMM 73-21-01-000-801
Removal of the Electronic Engine Control (EEC)
AMM 73-21-01-400-801
Installation of the Electronic Engine Control (EEC)
AMM 73-21-60-000-001
Removal of the Electronic Control Unit (ECU)
AMM 73-21-60-400-001
Installation of the Electronic Control Unit (ECU)
3. Fault Confirmation
NOTE: This troubleshooting task is not necessary for operators who do the "one engine taxi" procedure according to FCOM, and get the maintenance message from the engine that was not in operation during flight phase ph02.
Subtask 22-31-00-865-051-A
A. Make sure that this(these) circuit breaker(s) is(are) closed:
PANELDESIGNATIONFINLOCATION
** ON A/C ALL
49VUENGINE/2/FADEC A/AND EIU 22KS2A05
121VUENGINE/ENG2/FADEC B/AND EIU 24KS2Q40
Subtask 22-31-00-710-066-A
B. Test
   (1) Energize the aircraft electrical circuits AMM 24-41-00-861-002.
   (2) On the center pedestal, on ENG panel 115VU:
     (a) Make sure that the ENG/MODE selector switch is in the NORM position.
     (b) Make sure that the ENG/MASTER 2 control switch is in the OFF position.
     (c) Put a WARNING NOTICE(S) in position to tell persons not to operate the ENG/MODE selector switch and the ENG/MASTER 2 control switch.
   (3) On the ENG section of maintenance panel 50VU:
     (a) Release the FADEC GND PWR/2 pushbutton switch (the ON legend of this pushbutton switch comes on).
   (4) Do the Ground Scanning of the AFS AMM 22-91-00-710-001.
4. Fault Isolation
Subtask 22-31-00-810-060-D ** ON A/C NOT FOR ALL
A. If the test gives the maintenance message AFS: FADEC2 (ISSUED BY: FG1):
   (1) If the fault continues:
  • do a check and repair the wirings of the FADEC OPP A and FADEC OPP B bus from the FMGC 1 (1CA1) to the first terminal block ASM 228601.
   (2) If the fault continues:
Subtask 22-31-00-810-061-D ** ON A/C NOT FOR ALL
B. If the test gives the maintenance message AFS: FADEC2 (ISSUED BY: FG2):
   (1) If the fault continues:
  • do a check and repair the wirings of the FADEC OWN A and FADEC OWN B bus from the FMGC 2 (1CA2) to the first terminal block ASM 228601.
   (2) If the fault continues:
Subtask 22-31-00-810-060-G ** ON A/C NOT FOR ALL
C. If the test gives the maintenance message AFS: FADEC2 (ISSUED BY: FG1):
   (1) If the fault continues:
  • do a check and repair the wirings of the FADEC OPP A and FADEC OPP B bus from the FMGC 1 (1CA1) to the first terminal block ASM 228601.
   (2) If the fault continues:
Subtask 22-31-00-810-061-G ** ON A/C NOT FOR ALL
D. If the test gives the maintenance message AFS: FADEC2 (ISSUED BY: FG2):
   (1) If the fault continues:
  • do a check and repair the wirings of the FADEC OWN A and FADEC OWN B bus from the FMGC 2 (1CA2) to the first terminal block ASM 228601.
   (2) If the fault continues:
Subtask 22-31-00-710-067-A
E. Do the test given in Para. 3.
[Rev.8 from Aug 2018] 2026.04.04 04:25:09 UTC
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