(2) Repeat the fault isolation procedure if the fault continues.
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TASK 73-20-00-810-864
Loss of T12 Sensor Signal through the Channel B on Engine 2
1. Possible Causes
_______________
- T12 temperature sensor
- ECU (4000KS)
- harness HJ10
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific bristle brush
B. Consumable Materials
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
Material No. CP2011 *
stoddard solvent (Ref. 70-30-00)
C. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 73-21-40-000-001 Removal of the T12 Temperature Sensor AMM 73-21-40-400-001 Installation of the T12 Temperature Sensor AMM 73-21-50-000-043 Removal of the HJ10 Harness AMM 73-21-50-210-002 Visual Inspection of the Wiring Harnesses AMM 73-21-50-400-043 Installation of the HJ10 Harness AMM 73-21-60-000-001 Removal of the Electronic Control Unit (ECU) AMM 73-21-60-400-001 Installation of the Electronic Control Unit (ECU) AMM 73-29-00-710-040 Operational Test of the FADEC on the Ground (with
Engine non Motoring)
ASM 73-25/18
3. Fault Confirmation
__________________
A. Do the operational test of the FADEC 2B on the ground (with engine non motoring) (Ref. AMM TASK 73-29-00-710-040).
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4. Fault Isolation
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A. The failure message is generated if channel B input from the T12 temperature sensor is invalid or out of range.
(1) If the failure messsage T12 SNSR, J10, ECU is not confirmed:
- replace the T12 temperature sensor (Ref. AMM TASK 73-21-40-000-001) and (Ref. AMM TASK 73-21-40-400-001).
NOTE : Such a failure can be intermittent and therefore requires the
____ replacement of the T12 temperature sensor as a first maintenance action.
(2) If the failure message T12 SNSR, J10, ECU is not confirmed but is repetitive:
- do the following procedure after the replacement of the T12 temperature sensor.
(a) Disconnect the harness HJ10 from the T12 temperature sensor (C102 connector) (Ref. ASM 73-25/18):
- visually examine the receptacle and the connector for damaged pins and contamination (Ref. AMM TASK 73-21-50-210-002).
1 If damage is found:
_ - repair or replace as required.
2 If no damage is found:
_
- do a cleaning of the connectors using a bristle brush and stoddard solvent (Material No. CP2011) (Ref. AMM TASK 73-21-50-210-002).
3 If the fault continues during the subsequent flights:
_
- replace the ECU (4000KS) (Ref. AMM TASK 73-21-60-000-001) and (Ref. AMM TASK 73-21-60-400-001).
4 If the fault continues during the subsequent flights:
_
- replace the harness HJ10 (Ref. AMM TASK 73-21-50-000-043) and (Ref. AMM TASK 73-21-50-400-043).
(3) If the failure message T12 SNSR, J10, ECU is confirmed:
- replace the T12 temperature sensor (Ref. AMM TASK 73-21-40-000-001) and (Ref. AMM TASK 73-21-40-400-001).
(a) Disconnect the harness HJ10 from the T12 temperature sensor (C102 connector) (Ref. ASM 73-25/18):
- visually examine the receptacle and the connector for damaged pins and contamination (Ref. AMM TASK 73-21-50-210-002).
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