DOC AIRBUS | TSM A320FDeterioration of the Angle of Attack Sensor 3
TASK 34-11-00-810-894-A
Deterioration of the Angle of Attack Sensor 3
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 34-11-00-710-094-A
Subtask 34-11-00-810-212-A ** ON A/C NOT FOR ALL
[Rev.8 from Aug 2018]
2026.04.04 04:32:18 UTC
Deterioration of the Angle of Attack Sensor 3
1. Possible Causes
- SENSOR-ANGLE OF ATTACK, 3 [3FP3]
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| AMM 34-11-19-000-001 | Removal of the Angle of Attack Sensor |
| AMM 34-11-19-400-001 | Installation of the Angle of Attack Sensor |
Subtask 34-11-00-710-094-A
A. Test
Not applicable, you cannot confirm this fault on the ground.
4. Fault IsolationNot applicable, you cannot confirm this fault on the ground.
Subtask 34-11-00-810-212-A ** ON A/C NOT FOR ALL
A. If the PFR gives the class2 fault message AOA SNSR3 (3FP3)/ADIRU3 (1FP3) and the logbook gives the maintenance status "ADR3":
Subtask 34-11-00-810-212-B ** ON A/C NOT FOR ALL - Do a visual check of the angle of attack sensor 3 (3FP3).
- Replace the SENSOR-ANGLE OF ATTACK, 3 [3FP3] AMM 34-11-19-000-001 and AMM 34-11-19-400-001.
- No other action is necessary.
- Replace the SENSOR-ANGLE OF ATTACK, 3 [3FP3] AMM 34-11-19-000-001 and AMM 34-11-19-400-001.
A. If the PFR gives the class2 fault message AOA SENSOR3 (3FP3)/ADIRU3 (1FP3) and the logbook gives the maintenance status "ADR3":
Subtask 34-11-00-810-213-B ** ON A/C NOT FOR ALL - Do a visual check of the angle of attack sensor 3 (3FP3).
- Replace the SENSOR-ANGLE OF ATTACK, 3 [3FP3] AMM 34-11-19-000-001 and AMM 34-11-19-400-001.
- No other action is necessary.
- Replace the SENSOR-ANGLE OF ATTACK, 3 [3FP3] AMM 34-11-19-000-001 and AMM 34-11-19-400-001.
B. If the maintenance message AOA SNSR3 (3FP3)/ADIRU3 (1FP3) is shown on the Ground Scanning report, after the test of the angle of attack warning:
- no maintenance action is necessary.
NOTE: At the end of the test, on the ADIRS MSU, it is necessary to set the OFF/NAV/ATT selector switch related to the ADIRU3 to OFF for some seconds then to NAV to cancel the messages (fast re-alignment is not sufficient)