DOC AIRBUS | TSM A320FAFT LDCC Isolation Valves are not in open position before executing the AFT LDCC Smoke Warning Test
TASK 26-16-00-810-825-A
AFT LDCC Isolation Valves are not in open position before executing the AFT LDCC Smoke Warning Test
1. Possible Causes
2. Job Set-up Information
A. Referenced Information
3. Fault Confirmation
Subtask 26-16-00-865-071-A ** ON A/C NOT FOR ALL
Subtask 26-16-00-810-119-A ** ON A/C NOT FOR ALL
Subtask 26-16-00-860-074-A ** ON A/C NOT FOR ALL
[Rev.8 from Aug 2018]
2026.04.04 04:27:19 UTC
AFT LDCC Isolation Valves are not in open position before executing the AFT LDCC Smoke Warning Test
1. Possible Causes
2. Job Set-up Information
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| TSM TASK 21-28-00-810-802-A | AFT Cargo-Compartment Isolation Valve(s) Fault |
| AMM 26-10-00-740-802 | Ground Scanning of the Cabin Intercommunication Data-System (CIDS) - Smoke Detection Function (SDF) |
Subtask 26-16-00-865-071-A ** ON A/C NOT FOR ALL
A. Table of the circuit breakers used in this procedure:
Subtask 26-16-00-710-099-A ** ON A/C NOT FOR ALL | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | AIR COND/CIDS/SDF/DIR2 ESS | 18WH | C06 |
| 49VU | AIR COND/CIDS/SDF/DIR1 ESS | 15WH | C05 |
| 122VU | AIR COND/CIDS/SDF/DIR NORM/2 | 14WH | T18 |
| 122VU | AIR COND/CIDS/SDF/DIR NORM/1 | 17WH | T17 |
B. Test
(1) Open the circuit breakers 14WH, 15WH, 17WH and 18WH, wait for approximately 10 seconds and close them again, wait for a minimum of 30 seconds before you start the test.
(2) After a minimum time of 30 seconds, do the Ground Scanning of the Cabin Intercommunication Data-System (CIDS) - Smoke Detection Function (SDF) AMM 26-10-00-740-802.
4. Fault Isolation(1) Open the circuit breakers 14WH, 15WH, 17WH and 18WH, wait for approximately 10 seconds and close them again, wait for a minimum of 30 seconds before you start the test.
(2) After a minimum time of 30 seconds, do the Ground Scanning of the Cabin Intercommunication Data-System (CIDS) - Smoke Detection Function (SDF) AMM 26-10-00-740-802.
Subtask 26-16-00-810-119-A ** ON A/C NOT FOR ALL
A. If the test gives a different maintenance message:
Subtask 26-16-00-810-120-A ** ON A/C NOT FOR ALL - Do the trouble shooting procedure related to the maintenance message.
B. If the test gives the maintenance message TEST OK, no other maintenance action is necessary.
Subtask 26-16-00-810-121-A ** ON A/C NOT FOR ALL C. If the test gives the maintenance message
AFT CARGO ISOL VALVES/ CVC (10HN):
(1) Do the trouble shooting procedure (Ref. TSM TASK 21-28-00-810-802) for the ISOL VALVE AFT CARGO OUTLET [33HN] and ISOL VALVE AFT CARGO INLET [34HN] .
Subtask 26-16-00-710-100-A ** ON A/C NOT FOR ALL AFT CARGO ISOL VALVES/ CVC (10HN):
(1) Do the trouble shooting procedure (Ref. TSM TASK 21-28-00-810-802) for the ISOL VALVE AFT CARGO OUTLET [33HN] and ISOL VALVE AFT CARGO INLET [34HN] .
D. Do the test given in Para. 3.
5. Close-upSubtask 26-16-00-860-074-A ** ON A/C NOT FOR ALL
A. Put the aircraft back to its initial configuration.