TASK 73-20-00-810-929
 Failure of the Control of the Solenoid 2 of the Fuel Return Valve through the two Channels on Engine 1
 1. Possible Causes

_______________

 2. Job Set-up Information

______________________
 A. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
73-20-00-810-909 Failure of the Control of the Solenoid 2 of the Fuel Return Valve on Channel A, Engine 1 73-20-00-810-911 Failure of the Control of the Solenoid 2 of the Fuel Return Valve on Channel B, 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, FRV (SOL 2), ECU and J8, FRV (SOL 2), ECU:
 - do the following troubleshooting procedures (Ref. TASK 73-20-00-810-909) and (Ref. TASK 73-20-00-810-911).
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 Failure of the Control of the Solenoid 2 of the Fuel Return Valve through the two Channels on Engine 2
 1. Possible Causes

_______________

 2. Job Set-up Information

______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
73-20-00-810-910 Failure of the Control of the Solenoid 2 of the Fuel Return Valve on Channel A, Engine 2 73-20-00-810-912 Failure of the Control of the Solenoid 2 of the Fuel Return Valve on Channel B, 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, FRV (SOL 2), ECU and J8, FRV (SOL 2), ECU:
 - do the following troubleshooting procedures (Ref. TASK 73-20-00-810-910) and (Ref. TASK 73-20-00-810-912).
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 **ON A/C ALL
 TASK 73-20-00-810-931
 Failure of the High Pressure Shut Off Valve Switch of the HMU on Engine 1
 1. Possible Causes
_______________
 - hydromechanical unit (HMU)

 - harness J7

 - harness J8

 - ECU (4000KS)

 2. Job Set-up Information
______________________
R A. Fixtures, Tools, Test and Support Equipment

R -------------------------------------------------------------------------------R REFERENCE QTY DESIGNATION
R -------------------------------------------------------------------------------
R No specific bristle brush

R B. Consumable Materials

R -------------------------------------------------------------------------------R REFERENCE DESIGNATION
R -------------------------------------------------------------------------------
R Material No. CP2011 *
R stoddard solvent (Ref. 70-30-00)

R C. Referenced Information

 -------------------------------------------------------------------------------
REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
AMM  71-00-00-710-002 
AMM  73-21-10-000-002 
AMM  73-21-10-400-002 
AMM  73-21-50-000-040 
AMM  73-21-50-000-041 
R  AMM  73-21-50-210-002 
AMM  73-21-50-400-040 
AMM  73-21-50-400-041 
AMM  73-21-60-000-001 
AMM  73-21-60-400-001 
AMM  73-29-00-710-040 
　
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