DOC AIRBUS | TSM A320FAFT LDCC Smoke Detector(s) Fault
TASK 26-16-00-810-802-A
AFT LDCC Smoke Detector(s) Fault
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 26-16-00-865-051-A ** ON A/C NOT FOR ALL
Subtask 26-16-00-810-052-A ** ON A/C NOT FOR ALL
Subtask 26-16-00-860-051-C ** ON A/C NOT FOR ALL
[Rev.8 from Aug 2018]
2026.04.04 04:27:18 UTC
AFT LDCC Smoke Detector(s) Fault
1. Possible Causes
- cargo smoke detector
- wiring
- SDCU [10WQ]
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| AMM 26-16-00-710-001 | Operational Check of Cargo-Compartment Smoke-Detection by PTT |
| ASM 261602 | |
| AMM 26-16-15-000-001 | Removal of the Cargo-Compartment Smoke Detectors |
| AMM 26-16-15-400-001 | Installation of the Cargo-Compartment Smoke Detectors |
| 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) |
Subtask 26-16-00-865-051-A ** ON A/C NOT FOR ALL
A. Table of the circuit breakers used in this procedure:
Subtask 26-16-00-710-051-C ** ON A/C NOT FOR ALL | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | AIR COND/SDCU/CHAN1 | 11WQ | C06 |
| 122VU | AIR COND/SDCU/CHAN2 | 12WQ | T18 |
B. Test
(1) Open the circuit breakers 11WQ and 12WQ.
(a) After 60 seconds, close the circuit breakers 11WQ and 12WQ.
(b) After one more minute, start the subsequent test.
(2) Do the operational test of the cargo compartment smoke detection AMM 26-16-00-710-001.
4. Fault Isolation(1) Open the circuit breakers 11WQ and 12WQ.
(a) After 60 seconds, close the circuit breakers 11WQ and 12WQ.
(b) After one more minute, start the subsequent test.
(2) Do the operational test of the cargo compartment smoke detection AMM 26-16-00-710-001.
Subtask 26-16-00-810-052-A ** ON A/C NOT FOR ALL
A. If the test gives a different maintenance message:
Subtask 26-16-00-810-067-A ** ON A/C NOT FOR ALL - Do the trouble shooting procedure related to the maintenance message.
B. If the test is OK:
Subtask 26-16-00-810-053-A ** ON A/C NOT FOR ALL - no other maintenance action is necessary.
C. If the test gives the maintenance message SMOKE DET X WH AFT LDCC (X = RESP. DETECTOR):
Subtask 26-16-00-710-057-A ** ON A/C NOT FOR ALL - replace the related cargo smoke detector AMM 26-16-15-000-001 and AMM 26-16-15-400-001.
- do a check and repair the wiring if necessary between the SDCU connected cargo compartment smoke detectors ASM 261602.
- replace the SDCU [10WQ] AMM 26-17-34-000-001 and AMM 26-17-34-400-001.
D. Do the test given in Para. 3.
5. Close-upSubtask 26-16-00-860-051-C ** ON A/C NOT FOR ALL
A. Put the aircraft back to its initial configuration.