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 Loss of the LPTC Torque Motor Control through the two Channels on Engine 1
 1. Possible Causes

_______________

 2. Job Set-up Information

______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
73-29-00-810-892 Loss of LPTC Torque Motor Control through the Channel A on Engine 1 73-29-00-810-893 Loss of LPTC Torque Motor Control 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 J7, HMU (LPTCTM), ECU and J8, HMU (LPTCTM), ECU:
 - do the following troubleshooting procedures (Ref. TASK 73-29-00-810-892) and (Ref. TASK 73-29-00-810-893).
 F 『R EEFF : 106-149, 155-199, 208-299, 301-399, E ∞∞73-29-00∞∞∞∞∞∞∞∞∞∞Page A293
 E E401-499, Aug 01/05 E E ECES
E TASK 73-29-00-810-915

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 Loss of the LPTC Torque Motor Control through the two Channels on Engine 2
 1. Possible Causes

_______________

 2. Job Set-up Information

______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
73-29-00-810-894 Loss of LPTC Torque Motor Control through the Channel A on Engine 2 73-29-00-810-895 Loss of LPTC Torque Motor Control 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 J7, HMU (LPTCTM), ECU and J8, HMU (LPTCTM), ECU:
 - do the following troubleshooting procedures (Ref. TASK 73-29-00-810-894) and (Ref. TASK 73-29-00-810-895).
 F 『R EEFF : 106-149, 155-199, 208-299, 301-399, E ∞∞73-29-00∞∞∞∞∞∞∞∞∞∞Page A294
 E E401-499, Aug 01/05 E E ECES
E TASK 73-29-00-810-916

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 Loss of the HPTC Torque Motor Control through the two Channels on Engine 1
 1. Possible Causes

_______________

 2. Job Set-up Information

______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
73-29-00-810-872 Loss of the HPTC Torque Motor Control through the Channel A on Engine 1 73-29-00-810-873 Loss of the HPTC Torque Motor Control 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 J7, HMU (HPTCTM), ECU and J8, HMU (HPTCTM), ECU:
 - do the following troubleshooting procedures (Ref. TASK 73-29-00-810-872) and (Ref. TASK 73-29-00-810-873).
 F 『R EEFF : 106-149, 155-199, 208-299, 301-399, E ∞∞73-29-00∞∞∞∞∞∞∞∞∞∞Page A295
 E E401-499, Aug 01/05 E E ECES
E TASK 73-29-00-810-917

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 Loss of the HPTC Torque Motor Control through the two Channels on Engine 2
　
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