4. Fault Isolation
_______________
A. If the maintenance message TAT SENSOR (11FP2) is shown:
- replace the SENSOR-TAT, 2 (11FP2) (Ref. AMM TASK 34-11-18-000-001) and (Ref. AMM TASK 34-11-18-400-001).
R
TASK 34-11-00-810-865
Different Total Air Temperature on the ADIRUs
1. Possible Causes
_______________
- SENSOR-TAT, 1 (11FP1)
- SENSOR-TAT, 2 (11FP2)
- PHC-1 (6DA1)
- PHC-2 (6DA2)
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 30-31-34-000-002 Removal of the Probe Heat Computer (PHC)
(6DA1,6DA2,6DA3)
AMM 30-31-34-400-002 Installation of the Probe Heat Computer (PHC)
(6DA1,6DA2,6DA3)
AMM 31-60-00-860-001 EIS Start Procedure
AMM 34-10-00-860-002 ADIRS Start Procedure
AMM 34-11-18-000-001 Removal of the TAT Sensor (11FP1, 11FP2)
AMM 34-11-18-400-001 Installation of the TAT Sensor (11FP1, 11FP2)
ASM 34-11/02
3. Fault Confirmation
__________________
R **ON A/C 051-099, 106-149, 204-299, 301-399, 401-499,
A. Test
Not applicable, you cannot confirm this fault on the ground.
R **ON A/C ALL
4. Fault Isolation
_______________
A. If the POST FLIGHT REPORT gives the maintenance message TAT SENSOR (11FP1)/ TAT SENSOR (11FP2):
- make sure that the scoop and the choke of the TAT sensor 1 and TAT sensor 2 are not clogged or dirty.
(1) If the scoop or the choke of one TAT sensor is damaged:
- repair the defective TAT sensor.
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : ALL ∞∞34-11-00∞∞∞∞∞∞∞∞∞∞Page A216
Aug 01/05 CES
(2) If the scoop and the choke of the TAT sensors are not damaged:
- do the EIS start procedure (lower ECAM DU and CAPT ND only) (Ref. AMM TASK 31-60-00-860-001),
- do the ADIRS start procedure (Ref. AMM TASK 34-10-00-860-002),
- write the TAT2 value (given by the ADR2) shown at the bottom of the lower ECAM DU,
- on the SWITCHING panel 8VU, set the ECAM/ND XFR selector switch to CAPT,
- write the TAT1 value (given by the ADR1) shown at the L bottom of the CAPT ND,
- on the SWITCHING panel 8VU, set the AIR DATA selector switch to CAPT/3,
- write the TAT3 value (given by the ADR3) shown at the L bottom of the CAPT ND.
(a) Compare the three total air temperature values with the external ambient temperature:
1 If the value of the TAT sensor 1 or TAT sensor 3 is different:
_
- replace the SENSOR-TAT, 1 (11FP1) (Ref. AMM TASK 34-11-18-000-001) and (Ref. AMM TASK 34-11-18-400-001).
2 If the value of the TAT sensor 2 is different:
_
- replace the SENSOR-TAT, 2 (11FP2) (Ref. AMM TASK 34-11-18-000-001) and (Ref. AMM TASK 34-11-18-400-001).
3 If the values are the same:
_
- disconnect the electrical connectors from the TAT sensors 1 and 2
- do a check of the resistance between pins A/B and A/C of the TAT sensors 1 and 2. (Ref. ASM 34-11/02)
a If the resistance value of the TAT sensor 1 is more than 24
_ ohms (open circuit) or less than 18 ohms (short circuit):
- replace the TAT sensor 1.
b If the resistance value of the TAT sensor 2 is more than 24
_ ohms (open circuit) or less than 18 ohms (short circuit):
- replace the TAT sensor 2.
c If the resistance value of the TAT sensor 1 is between 18
_
ohms and 24 ohms:
- replace the PHC-1 (6DA1) (Ref. AMM TASK 30-31-34-000-002) and (Ref. AMM TASK 30-31-34-400-002).
d If the resistance value of the TAT sensor 2 is between 18
_
ohms and 24 ohms:
- replace the PHC-2 (6DA2) (Ref. AMM TASK 30-31-34-000-002) and (Ref. AMM TASK 30-31-34-400-002).
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : ALL ∞∞34-11-00∞∞∞∞∞∞∞∞∞∞Page A217
Aug 01/05 CES 5. Close-up
________ R **ON A/C 051-099, 106-149, 204-299, 301-399, 401-499,
A. Put the aircraft back to its initial configuration.
(1) On the SWITCHING panel 8VU, set the ECAM/ND XFR and AIR DATA selector switches to NORM.
(2) On the ADIRs CDU, set the OFF/NAV/ATT selector switches to OFF. 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：A320 Trouble Shooting Manual 排故手册 导航 NAVIGATION 1(43)
