DOC AIRBUS | TSM A320FLight Unit Fault
TASK 33-21-00-810-808-A
Light Unit Fault
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 33-21-00-710-070-A ** ON A/C NOT FOR ALL 4. Fault Isolation
Subtask 33-21-00-810-064-A ** ON A/C NOT FOR ALL
[Rev.8 from Aug 2018]
2026.04.04 04:31:55 UTC
Light Unit Fault
1. Possible Causes
- BALLAST UNIT
- CLEDU
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| AMM 23-73-00-740-012 | Ground Scanning of the Cabin Intercommunication Data System (CIDS) |
| AMM 33-21-11-000-001 | Removal of the Ballast Unit, Lampholder and Fluorescent Tube |
| AMM 33-21-11-000-802 | Removal of the Cabin LED Unit (CLEDU) |
| AMM 33-21-11-400-001 | Installation of the Ballast Unit, Lampholder and Fluorescent Tube |
| AMM 33-21-11-400-802 | Installation of the Cabin LED Unit (CLEDU) |
Subtask 33-21-00-710-070-A ** ON A/C NOT FOR ALL 4. Fault Isolation
Subtask 33-21-00-810-064-A ** ON A/C NOT FOR ALL
A. If the Ground Scanning gives the maintenance message:
BU<APPL.AREA>SRXX X
Subtask 33-21-00-810-064-B ** ON A/C NOT FOR ALL BU<APPL.AREA>SRXX X
- replace the related BALLAST UNIT AMM 33-21-11-000-001 and AMM 33-21-11-400-001.
A. If the Ground Scanning gives the maintenance message:
BU<APPL.AREA>SRXX X
Subtask 33-21-00-710-071-A ** ON A/C NOT FOR ALL BU<APPL.AREA>SRXX X
- replace the related CLEDU AMM 33-21-11-000-802 and AMM 33-21-11-400-802.
B. Do the test given in Para. 3.