W DOC AIRBUS | TSM A320F

AFT Cargo-Compartment Heating Controlling Fault

TASK 21-43-00-810-811-A
AFT Cargo-Compartment Heating Controlling Fault

1. Possible Causes
  • AFT CARGO HEAT CONTROLLER [10HC]
  • RELAY-TAPRV CLOSE (17HC)
  • PUSHBUTTON SWITCH-CARGO HEAT/HOT AIR (16HC)
  • wiring
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
AMM 21-43-00-740-002
Power-up (BITE) Test of the Cargo-Compartment Heating Controller
ASM 214301
ASM 214302
AMM 21-43-34-000-002
Removal of the AFT Cargo Heat Controller
AMM 21-43-34-400-002
Installation of the AFT Cargo Heat Controller
3. Fault Confirmation
Subtask 21-43-00-710-061-A
A. To Confirm the Fault
   (1) Do a read out of the POST FLIGHT and/or LAST LEG REPORT.
   (2) Do the Power-up (BITE) Test of the Cargo-Compartment Heating Controller AMM 21-43-00-740-002.
4. Fault Isolation
Subtask 21-43-00-810-066-A ** ON A/C NOT FOR ALL
A. If the test gives the maintenance message AFT CARGO HEAT CONT:
   (1) If the fault continues:
  • do a check of the RELAY-TAPRV CLOSE (17HC) and replace it if necessary ASM 214301.
   (2) If the fault continues:
  • do a check of the PUSHBUTTON SWITCH-CARGO HEAT/HOT AIR (16HC) and replace it if necessary ASM 214301.
   (3) If the fault continues:
  • do a check and repair the wiring ASM 214302 from:
  • the ACHC (10HC) to the CB (31HN),
  • the ACHC (10HC) to ground,
  • the ACHC (10HC) to the SW (50WV),
  • the ACHC (10HC) to the RELAY (11LP),
  • the ACHC (10HC) AA/9A to ground,
  • the ACHC (10HC) to the VC (10HN),
  • the ACHC (10HC) to the LGCIU 1 (5GA1),
  • the ACHC (10HC) to the SDAC 1 (1WV1) and,
  • the ACHC (10HC) to the SDAC 2 (1WV2).
Subtask 21-43-00-810-066-C ** ON A/C NOT FOR ALL
A. If the test gives the maintenance message AFT CARGO HEAT CONT:
   (1) If the fault continues:
  • do a check of the RELAY-TAPRV CLOSE (17HC) and replace it if necessary ASM 214301.
   (2) If the fault continues:
  • do a check of the PUSHBUTTON SWITCH-CARGO HEAT/HOT AIR (16HC) and replace it if necessary ASM 214301.
   (3) If the fault continues:
  • do a check and repair the wiring ASM 214302 from:
  • the ACHC (10HC) to the CB (31HN),
  • the ACHC (10HC) to ground,
  • the ACHC (10HC) to the RELAY (11LP),
  • the ACHC (10HC) AA/9A to ground,
  • the ACHC (10HC) to the VC (10HN),
  • the ACHC (10HC) to the LGCIU 1 (5GA1),
  • the ACHC (10HC) to the SDAC 1 (1WV1) and,
  • the ACHC (10HC) to the SDAC 2 (1WV2).
Subtask 21-43-00-710-072-A
B. Do the test as given in the Para. 3.A.
5. Close-up
Subtask 21-43-00-860-060-A
A. Put the aircraft back to its initial configuration.
[Rev.8 from Aug 2018] 2026.04.04 04:24:45 UTC
"WTRUIB" 2025