DOC AIRBUS | TSM A320FLavatory Lighting - In one Lavatory the Lavatory Light cannot be dimmed
TASK 33-24-00-810-803-A
Lavatory Lighting - In one Lavatory the Lavatory Light cannot be dimmed
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 33-24-00-710-052-A 4. Fault Isolation
Subtask 33-24-00-810-052-A ** ON A/C NOT FOR ALL
Subtask 33-24-00-860-052-A
[Rev.8 from Aug 2018]
2026.04.04 04:31:55 UTC
Lavatory Lighting - In one Lavatory the Lavatory Light cannot be dimmed
1. Possible Causes
- LAV OCCPD SWITCH
- wiring
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| TSM TASK 33-26-00-810-802-A | Lavatory Signs - The Occupied or Unoccupied Symbol in the Lavatory Lighted Sign does not come on |
| AMM 33-21-11-000-001 | Removal of the Ballast Unit, Lampholder and Fluorescent Tube |
| AMM 33-21-11-400-001 | Installation of the Ballast Unit, Lampholder and Fluorescent Tube |
| AMM 33-24-00-710-001 | Operational Test of the Lavatory Lighting LQ |
| ASM 332401 | |
| AMM 33-24-11-000-006 | Removal of the Ballast Unit and Lampholder |
| AMM 33-24-11-000-802 | Removal of the Cabin LED Unit (CLEDU) |
| AMM 33-24-11-400-006 | Installation of the Ballast Unit and Lampholder |
| AMM 33-24-11-400-802 | Installation of the Cabin LED Unit (CLEDU) |
| ASM 332601 | |
| AMM 33-26-11-000-001 | Removal of the Lavatory Door Microswitch (WJ) |
| AMM 33-26-11-400-001 | Installation of the Lavatory Door Microswitch (WJ) |
Subtask 33-24-00-710-052-A 4. Fault Isolation
Subtask 33-24-00-810-052-A ** ON A/C NOT FOR ALL
A. If the test confirms the fault:
Subtask 33-24-00-810-052-B ** ON A/C NOT FOR ALL - adjust the position of the related LAV OCCPD SWITCH in the door frame of the lavatory AMM 33-26-11-400-001.
- do a check of the related LAV OCCPD SWITCH and replace it if necessary AMM 33-26-11-000-001 and AMM 33-26-11-400-001.
- replace the related BALLAST UNIT AMM 33-21-11-000-001 and AMM 33-21-11-400-001.
- do a check and repair the wiring if necessary between the related:
BALAST UNIT pin D and the LAV OCCPD SWITCH pin NF ASM 332401 and ASM 332601.
- do the trouble shooting procedures for the related LAV OCCPD SWITCH (Ref. TSM TASK 33-26-00-810-802).
A. If the test confirms the fault:
Subtask 33-24-00-710-055-A - adjust the position of the related LAV OCCPD SWITCH in the door frame of the lavatory AMM 33-26-11-400-001.
- do a check of the related LAV OCCPD SWITCH and replace it if necessary AMM 33-26-11-000-001 and AMM 33-26-11-400-001.
- replace the related BALLAST UNIT (if installed) AMM 33-24-11-000-006 and AMM 33-24-11-400-006.
- replace the related CLEDU (if installed) AMM 33-24-11-000-802 and AMM 33-24-11-400-802.
- do a check and repair the wiring if necessary between the related:
BALAST UNIT (if installed) pin D and the LAV OCCPD SWITCH pin NF ASM 332401 and ASM 332601.
- do a check and repair the wiring if necessary between the related:
CLEDU (if installed) pin D and the LAV OCCPD SWITCH pin NF ASM 332401 and ASM 332601.
- do the trouble shooting procedures for the related LAV OCCPD SWITCH (Ref. TSM TASK 33-26-00-810-802).
B. Do the test as given in the Para. 3.A .
5. Close-upSubtask 33-24-00-860-052-A
A. Put the aircraft back to its initial configuration.