TASK 34-11-00-810-861- 01
Different Angle of Attack Value on the three ADIRUs ( with G.S.E.)
1. Possible Causes
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- SENSOR-ANGLE OF ATTACK, 1 (3FP1)
- SENSOR-ANGLE OF ATTACK, 2 (3FP2)
- SENSOR-ANGLE OF ATTACK, 3 (3FP3)
2. Job Set-up Information
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A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific ARINC Reader
B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 31-36-00-740-008 Access to the Parameter Call-Up Menus AMM 34-10-00-860-002 ADIRS Start Procedure AMM 34-11-19-000-001 Removal of the Angle of Attack Sensor (3FP1, 3FP2,
3FP3) AMM 34-11-19-400-001 Installation of the Angle of Attack Sensor (3FP1, 3FP2, 3FP3)
R AMM 31-36-00 P.Block 001 AIDS INTERCONNECTION ((FDIMU, DAR)) ASM 34-13/01 34-11-00-991-003 Fig. 203
3. Fault Confirmation
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A. Test
Not applicable, you cannot confirm this fault on the ground.
4. Fault Isolation
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A. Solution 1: with ARINC Reader. If the POST FLIGHT REPORT gives the maintenance message AOA 3FP1 - AOA 3FP2 - AOA 3FP3 DISAGREE:
- do a visual check of the SENSOR-ANGLE OF ATTACK, 1 (3FP1), SENSOR-ANGLE OF ATTACK, 2 (3FP2) and SENSOR-ANGLE OF ATTACK, 3 (3FP3).
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞34-11-00∞∞∞∞∞∞∞∞∞∞Page A204
May 01/05 CES
(1) If one angle of attack sensor is damaged:
- replace the defective angle of attack sensor (Ref. AMM TASK 34-11-19-000-001) and (Ref. AMM TASK 34-11-19-400-001).
(2) If the angle of attack sensors are not damaged:
- do the ADIRS start procedure (Ref. AMM TASK 34-10-00-860-002)
- connect the ARINC Reader to the test connector 198VC on the panel 188VU and to the test connector 199VC on the panel 187VU (Ref. ASM 34-13/01)
- manually turn the angle of attack sensors (3FP1), (3FP2) and (3FP3) to the down position
- manually turn the angle of attack sensors (3FP1), (3FP2) and (3FP3) to the up position
- compare the angle of attack values (between -35 deg. and -34.5 deg. for the down position and between +84.5 deg. and +85 deg. for the up position) read on label 221:
ADIRU 1 199VC 3FP1 pins GG, HH
ADIRU 2 198VC 3FP2 pins GG, HH
ADIRU 3 199VC 3FP3 pins y, z
(a) If one value is different:
- replace the defective angle of attack sensor (Ref. AMM TASK 34-11-19-000-001) and (Ref. AMM TASK 34-11-19-400-001).
(b) If the values are corrects:
- do the Programmable Report.
B. Solution 2: with AIDS. If the POST FLIGHT REPORT gives the maintenance message AOA 3FP1 - AOA 3FP2 - AOA 3FP3 DISAGREE or AOA SNSR1 (3FP1)/SNSR2 (3FP2)/SNSR3 (3FP3):
- do a visual check of the SENSOR-ANGLE OF ATTACK, 1 (3FP1), SENSOR-ANGLE OF ATTACK, 2 (3FP2) and SENSOR-ANGLE OF ATTACK, 3 (3FP3).
(1) If one angle of attack sensor is damaged:
- replace the defective angle of attack sensor (Ref. AMM TASK 34-11-19-000-001) and (Ref. AMM TASK 34-11-19-400-001).
(2) If the angle of attack sensors are not damaged:
- do the ADIRS start procedure (Ref. AMM TASK 34-10-00-860-002)
- do the paragraph related to the Parametre Label Call-Up via MCDU of the Access to the Parameter Call-Up Menus procedure (Ref. AMM TASK 31-36-00-740-008)
- manually turn the angle of attack sensors (3FP1), (3FP2) and (3FP3) to the down position,
- manually turn the angle of attack sensors (3FP1), (3FP2) and (3FP3) to the up position,
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞34-11-00∞∞∞∞∞∞∞∞∞∞Page A205
May 01/05R CES
- compare the angle of attack values (between -35. and -34.5. for the down position and between +84.5. and +85. for the up position) read on label 221:
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