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 Loss of the VSV Torque Motor Control through the Channel A on Engine 1 and Channel B on Engine 2
 1. Possible Causes

_______________

 2. Job Set-up Information

______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
73-29-00-810-884 Loss of the VSV Torque Motor Control through the
 Channel A on Engine 1
 73-29-00-810-887 Loss of the VSV 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. Do the operational test of the FADEC 1A 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 (VSV TM), ECU on the channel 1A
 and

 - J8, HMU (VSV TM), ECU on the channel 2B

 (1) Do the trouble shooting procedure (Ref. TASK 73-29-00-810-884).

 (2) Do the trouble shooting procedure (Ref. TASK 73-29-00-810-887).

 F 『 EEFF : ALL E ∞∞73-29-00∞∞∞∞∞∞∞∞∞∞Page A284
 E E May 01/05 ERE
ECES  TASK 73-29-00-810-898

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 Loss of the VSV Torque Motor Control through the Channel B on Engine 1 and Channel A on Engine 2
 1. Possible Causes

_______________

 2. Job Set-up Information

______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
73-29-00-810-885 Loss of the VSV Torque Motor Control through the
 Channel B on Engine 1
 73-29-00-810-886 Loss of the VSV Torque Motor Control through the

 Channel A on Engine 2 AMM 73-29-00-710-040 Operational Test of the FADEC on the ground (with Engine Motoring)
 3. Fault Confirmation
__________________
 A. Do the operational test of the FADEC 1B and 2A 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:
 - J8, HMU (VSV TM), ECU on the channel 1B
 and

 - J7, HMU (VSV TM), ECU on the channel 2A

 (1) Do the trouble shooting procedure (Ref. TASK 73-29-00-810-885).

 (2) Do the trouble shooting procedure (Ref. TASK 73-29-00-810-886).

 F 『 EEFF : ALL E ∞∞73-29-00∞∞∞∞∞∞∞∞∞∞Page A285
 E E May 01/05 ERE
ECES  TASK 73-29-00-810-899

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 Loss of the VSV Torque Motor Control through the Channel B on Engine 1 and Channel B on Engine 2
 1. Possible Causes

_______________

 2. Job Set-up Information

______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
73-29-00-810-885 Loss of the VSV Torque Motor Control through the
 Channel B on Engine 1
 73-29-00-810-887 Loss of the VSV 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. Do the operational test of the FADEC 1B 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:
 - J8, HMU (VSV TM), ECU on the channel 1B
 and

 - J8, HMU (VSV TM), ECU on the channel 2B

 (1) Do the trouble shooting procedure (Ref. TASK 73-29-00-810-885).

 (2) Do the trouble shooting procedure (Ref. TASK 73-29-00-810-887).

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