W DOC AIRBUS | TSM A320F

Cargo Comp. Lighting - Light in the FWD or AFT Loading Area does not come on


TASK 33-34-00-810-803-A
Cargo Comp. Lighting - Light in the FWD or AFT Loading Area does not come on


1. Possible Causes
  • lamp
  • forward loading area light 11LU
  • forward loading area switch 7LU
  • wiring
  • LED unit
  • aft loading area light 12LU
  • aft loading area switch 9LU
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
AMM 33-34-00-710-001
Operational Test of the FWD and AFT Cargo Compartment Lighting
ASM 333401
3. Fault Confirmation
Subtask 33-34-00-710-052-A
A. Do the operational test of the FWD and AFT Cargo-Compartment Lighting AMM 33-34-00-710-001.
4. Fault Isolation
Subtask 33-34-00-810-054-A ** ON A/C NOT FOR ALL
A. If the operational test shows that the forward Loading Area Light does not come on:
  • replace the lamp .
   (1) If the fault continues:
     (a) If there is approx. 28 VDC:
  • replace the forward loading area light 11LU .
     (b) If there is no 28 VDC:
  • do a check of the forward loading area switch 7LU and replace it, if necessary.
   (2) If the fault continues:
  • do a check and repair the wiring between the forward loading area light 11LU and CB 3LU ASM 333401.
Subtask 33-34-00-810-055-A ** ON A/C NOT FOR ALL
B. If the operational test shows that the aft Loading Area Light does not come on:
  • replace the lamp .
   (1) If the fault continues:
     (a) If there is approx. 28 VDC:
  • replace the aft loading area light 12LU .
     (b) If there is no 28 VDC:
  • do a check of the aft loading area switch 9LU and replace it, if necessary.
   (2) If the fault continues:
  • do a check of the wiring between the aft loading area light 12LU and CB 3LU ASM 333401.
Subtask 33-34-00-810-054-B ** ON A/C NOT FOR ALL
C. If the operational test shows that the forward Loading Area Light does not come on:
  • replace the LED unit .
   (1) If the fault continues:
  • do a check for 28 VDC at the LED unit ASM 333401.
     (a) If there is approx. 28 VDC:
  • replace the forward loading area light 11LU .
     (b) If there is no 28 VDC:
  • do a check of the forward loading area switch 7LU and replace it, if necessary.
   (2) If the fault continues:
  • do a check and repair the wiring between the forward loading area light 11LU and CB 3LU ASM 333401.
Subtask 33-34-00-810-055-B ** ON A/C NOT FOR ALL
D. If the operational test shows that the aft Loading Area Light does not come on:
  • replace the LED unit .
   (1) If the fault continues:
  • do a check for 28 VDC at the LED unit ASM 333401.
     (a) If there is approx. 28 VDC:
  • replace the aft loading area light 12LU .
     (b) If there is no 28 VDC:
  • do a check of the aft loading area switch 9LU and replace it, if necessary.
   (2) If the fault continues:
  • do a check of the wiring between the aft loading area light 12LU and CB 3LU ASM 333401.
Subtask 33-34-00-710-055-A
E. Do the test as given in the Para. 3.A .
5. Close-up
Subtask 33-34-00-860-052-A
A. Put the aircraft back to its initial configuration.
[Rev.8 from Aug 2018] 2026.04.04 04:31:56 UTC