DOC AIRBUS | TSM A320FDisplay of the CAT 3 DUAL Message (INOP SYS) on ECAM STATUS Page
TASK 22-83-00-810-891-A
Display of the CAT 3 DUAL Message (INOP SYS) on ECAM STATUS Page
2. Job Set-up Information
A. Referenced Information
3. Fault Confirmation
Subtask 22-83-00-710-183-A 4. Fault Isolation
Subtask 22-83-00-810-173-A
[Rev.8 from Aug 2018]
2026.04.04 04:25:34 UTC
Display of the CAT 3 DUAL Message (INOP SYS) on ECAM STATUS Page
NOTE: Do not consider the CAT 3 DUAL information in the INOP SYS list, if it is no longer displayed after both engines are started.
1. Possible Causes2. Job Set-up Information
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| AMM 22-97-00-710-001 | Operational Test of the LAND CAT III Capability |
| AMM 24-22-55-000-001 | Removal of the Contactors |
| AMM 24-22-55-400-002 | Installation of the Contactors |
| AMM 24-35-55-000-001 | Removal of the Contactor |
| AMM 24-35-55-400-001 | Installation of the Contactor |
Subtask 22-83-00-710-183-A 4. Fault Isolation
Subtask 22-83-00-810-173-A
A. If the test is OK:
(1) Check the FG BITE (Trouble Shooting Data) of the previous flight:
Subtask 22-83-00-810-174-A (1) Check the FG BITE (Trouble Shooting Data) of the previous flight:
- retrieve a snapshot with event 7 from MON channel,
- check the 2nd digit of the Word 2 (-X--).
- replace the BTC-1 [11XU1] , AMM 24-22-55-000-001 and AMM 24-22-55-400-002
- if the fault continues, replace the BTC-2 [11XU2] , AMM 24-22-55-000-001 and AMM 24-22-55-400-002
- if the fault continues, replace the CNTOR-DC NORM BUS 2 SWITCHING [1PC2] , AMM 24-35-55-000-001 and AMM 24-35-55-400-001.
- no further action is required.
B. If the test is not OK:
- Do the trouble shooting procedure related to the maintenance message.