W DOC AIRBUS | TSM A320F

Loss of the Output Bus from the SDCU or the CIDS Director(s) to the CFDIU

TASK 31-32-00-810-813-A
Loss of the Output Bus from the SDCU or the CIDS Director(s) to the CFDIU

1. Possible Causes
  • CFDIU [1TW]
  • SDCU [10WQ]
  • wiring from the CFDIU (1TW) to the SDCU (10WQ)
  • DIR-CIDS, 1 [101RH]
  • DIR-CIDS, 2 [102RH]
  • wiring
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
AMM 23-73-34-000-001
Removal of the CIDS Director
AMM 23-73-34-400-001
Installation of the CIDS Director
AMM 26-17-34-000-001
Removal of the Smoke-Detection Control Unit (SDCU)
AMM 26-17-34-400-001
Installation of the Smoke-Detection Control Unit (SDCU)
AMM 31-32-00-740-009
Read the AVIONICS STATUS on the MCDU
ASM 313204
AMM 31-32-34-000-001
Removal of the CFDIU
AMM 31-32-34-400-001
Installation of the CFDIU
3. Fault Confirmation
Subtask 31-32-00-740-072-A
A. Read the AVIONICS STATUS on the MCDU AMM 31-32-00-740-009.
4. Fault Isolation
Subtask 31-32-00-810-061-A ** ON A/C NOT FOR ALL
A. If the test gives the maintenance message NO SDCU DATA:
   (1) If the fault continues:
     (a) If the fault continues:
  • Do a check and repair the wiring from the CFDIU (1TW) to the SDCU (10WQ) from pins AA/11H,11J to pins AB/3C, 4C , ASM 313204.
Subtask 31-32-00-810-061-B ** ON A/C NOT FOR ALL
A. If the test gives the maintenance message NO SDCU DATA or NO CIDS-SDF DATA:
   (1) If the fault continues:
     (a) If the fault continues:
       1 If the fault continues:
  • Do a check and repair the wiring from the CFDIU pins AA/11H,11J to the CIDS director 1 (101RH) pins AA/9G, 9H ASM 313204.
         a If the fault continues:
  • Do a check and repair the wiring from the CFDIU pins AA/11H,11J to the CIDS director 2 (102RH) pins AA/9G, 9H ASM 313204.
Subtask 31-32-00-740-073-A
B. Do the test given in Para. 3.
[Rev.8 from Aug 2018] 2026.04.04 04:29:48 UTC
"WTRUIB" 2025