- Repeat the fault isolation process if the fault continues.

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 TASK 73-20-00-810-923
 loss of the T12 Sensor Signal through the two Channels on Engine 1
 1. Possible Causes

_______________

 2. Job Set-up Information

______________________
 A. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
73-20-00-810-861 Loss of T12 Sensor Signal through the Channel A on Engine 1 73-20-00-810-863 Loss of T12 Sensor Signal through the Channel B on Engine 1 AMM 73-29-00-710-040 Operational Test of the FADEC on the ground (with Engine Motoring)
 3. Fault Confirmation
__________________
 A. Test
 (1) Do the operational test of the FADEC 1A and 1B on the ground (with engine motoring) (Ref. AMM TASK 73-29-00-710-040).
 4. Fault Isolation
_______________
 A. If the test gives the maintenance messages T12 SNSR, J9, ECU and T12 SNSR, J10, ECU:
 - do the following troubleshooting procedures (Ref. TASK 73-20-00-810-861) and (Ref. TASK 73-20-00-810-863).
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 loss of the T12 Sensor Signal through the two Channels on Engine 2
 1. Possible Causes

_______________

 2. Job Set-up Information

______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
73-20-00-810-862 Loss of T12 Sensor Signal through the Channel A on Engine 2 73-20-00-810-864 Loss of T12 Sensor Signal through the Channel B on Engine 2 AMM 73-29-00-710-040 Operational Test of the FADEC on the ground (with Engine Motoring)
 3. Fault Confirmation
__________________
 A. Test
 (1) Do the operational test of the FADEC 2A and 2B on the ground (with engine motoring) (Ref. AMM TASK 73-29-00-710-040).
 4. Fault Isolation
_______________
 A. If the test gives the maintenance messages T12 SNSR, J9, ECU and T12 SNSR, J10, ECU:
 - do the following troubleshooting procedures (Ref. TASK 73-20-00-810-862) and (Ref. TASK 73-20-00-810-864).
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 Loss of the T25 Sensor Signal through the two Channels on Engine 1
 1. Possible Causes

_______________

 2. Job Set-up Information

______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
73-20-00-810-853 Loss of the T25 Sensor Signal through the Channel A on Engine 1 73-20-00-810-855 Loss of the T25 Sensor Signal through the Channel B on Engine 1 AMM 73-29-00-710-040 Operational Test of the FADEC on the ground (with Engine Motoring)
 3. Fault Confirmation
__________________
 A. Test
 (1) Do the operational test of the FADEC 1A and 1B on the ground (with engine motoring) (Ref. AMM TASK 73-29-00-710-040).
 4. Fault Isolation
_______________
 A. If the test gives the maintenance messages T25 SNSR, J11, ECU and T25 SNSR, J12, ECU:
 - do the following troubleshooting procedures (Ref. TASK 73-20-00-810-853) and (Ref. TASK 73-20-00-810-855).
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