Deterioration of the Angle of Attack Sensor 2

TASK 34-11-00-810-893-A
Deterioration of the Angle of Attack Sensor 2

1. Possible Causes

SENSOR-ANGLE OF ATTACK, 2 [3FP2]

2. Job Set-up Information
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

3. Fault Confirmation
Subtask 34-11-00-710-093-A

A. Test
Not applicable, you cannot confirm this fault on the ground.

4. Fault Isolation
Subtask 34-11-00-810-210-A ** ON A/C NOT FOR ALL

A. If the PFR gives the class2 fault message AOA SNSR2 (3FP2)/ADIRU2 (1FP2) and the logbook gives the maintenance status "ADR2":

Do a visual check of the angle of attack sensor 2 (3FP2).

(1) If the angle of attack sensor 2 (3FP2) is damaged:

Replace the SENSOR-ANGLE OF ATTACK, 2 [3FP2] AMM 34-11-19-000-001 and AMM 34-11-19-400-001.

(2) If the angle of attack sensor 2 (3FP2) is not damaged:

No other action is necessary.

(a) After the subsequent flight, if the fault continues:

Replace the SENSOR-ANGLE OF ATTACK, 2 [3FP2] .

Subtask 34-11-00-810-210-B ** ON A/C NOT FOR ALL

A. If the PFR gives the class2 fault message AOA SENSOR2 (3FP2)/ADIRU2 (1FP2) and the logbook gives the maintenance status "ADR2":

Do a visual check of the angle of attack sensor 2 (3FP2).

(1) If the angle of attack sensor 2 (3FP2) is damaged:

Replace the SENSOR-ANGLE OF ATTACK, 2 [3FP2] AMM 34-11-19-000-001 and AMM 34-11-19-400-001.

(2) If the angle of attack sensor 2 (3FP2) is not damaged:

No other action is necessary.

(a) After the subsequent flight, if the fault continues:

Replace the SENSOR-ANGLE OF ATTACK, 2 [3FP2] .

Subtask 34-11-00-810-211-A ** ON A/C NOT FOR ALL

B. If the maintenance message AOA SNSR2 (3FP2)/ADIRU2 (1FP2) 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 CDU, it is necessary to set the OFF/NAV/ATT selector switch related to the ADIRU2 to OFF for some seconds then to NAV to cancel the messages (fast re-alignment is not sufficient)

Subtask 34-11-00-810-211-D ** ON A/C NOT FOR ALL

B. If the maintenance message AOA SNSR2 (3FP2)/ADIRU2 (1FP2) 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 ADIRU2 to OFF for some seconds then to NAV to cancel the messages (fast re-alignment is not sufficient)

Subtask 34-11-00-810-211-E ** ON A/C NOT FOR ALL

B. If the maintenance message AOA SENSOR1 (3FP1)/ADIRU1 (1FP1) is shown on the Ground Scanning report, after the test of the angle of attack warning:

no maintenance action is necessary.

[Rev.8 from Aug 2018] 2026.04.04 04:32:18 UTC