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R (a) Replace the J14 Identification Connector (Ref. AMM TASK 73-21-90-R 000-002) (Ref. AMM TASK 73-21-90-400-002) or Do a Re-programming R of the Identification Connector (Push-pull Design only) (Ref. AMM R TASK 73-21-90-860-001).
R (2) If the nameplate is for a DAC engine:
R (a) Do a borescope inspection of the combustion chamber (Ref. AMM R TASK 72-41-00-290-001) and the high pressure turbine nozzle R assembly (Ref. AMM TASK 72-51-00-290-004).
R (b) Disconnect the cables HJ7 and HJ8 from the ECU and do a check of R the cable resistance between:
R . pins 6 and 7 (26 to 36 ohms)
R 1_ If the resistance value are specified limits:
R - Replace the BSV (Ref. AMM TASK 73-11-70-000-001) and (Ref.
R AMM TASK 73-11-70-400-001)

R 2_ If the resistance value are out of specified limits:
R - Disconnect the cables HJ7 and HJ8 from the HMU and do a
R check of the HMU resistance between:

R . pins 6 and 7 (26 to 36 ohms)
R a_ If the resistance value are in specified limits:
R - replace harness HJ7 (Ref. AMM TASK 73-21-50-000-040)
R (Ref. AMM TASK 73-21-50-400-040) and/or harness HJ8 (Ref.
R AMM TASK 73-21-50-000-041) (Ref. AMM TASK 73-21-50-400-R 041)

R b_ If the resistance value are out of specified limits:
R - Replace HMU (Ref. AMM TASK 73-21-10-000-001) (Ref. AMM
R TASK 73-21-10-400-001)

R (3) if the fault continues, replace the ECU (4000KS) (Ref. AMM TASK 73-R 21-60-000-001) (Ref. AMM TASK 73-21-60-400-001).

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R B. Do the test given in Para. 3.A.

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R TASK 73-10-00-810-846

R Failure of the BSV Open on Engine 2
R 1. Possible Causes_______________

R - J14 Identification Connector R - BSV R - harness HJ7 R - harness HJ8 R - HMU R - ECU (4000KS)
R 2. Job Set-up Information______________________

R A. Referenced Information
R -------------------------------------------------------------------------------R REFERENCE DESIGNATION R -------------------------------------------------------------------------------
R  AMM  72-41-00-290-001 
R 
R 
R 
R  AMM  72-51-00-290-004 
R 
R  AMM  73-11-70-000-001 
R  AMM  73-11-70-400-001 
R  AMM  73-21-10-000-001 
R  AMM  73-21-10-400-001 
R  AMM  73-21-50-000-040 
R  AMM  73-21-50-000-041 
R  AMM  73-21-50-400-040 
R  AMM  73-21-50-400-041 
R  AMM  73-21-60-000-001 
R  AMM  73-21-60-400-001 
R 
R  AMM  73-21-90-000-002 
R  AMM  73-21-90-400-002 
R  AMM  73-21-90-860-001 
R 
R  AMM  73-29-00-710-040 
R 
R  3. Fault Confirmation__________________ 
R  A. Test 

Borescope Inspection of the Combustion Chamber Liners, Dome Areas,High Pressure Turbine Nozzle Vanes and Shrouds (as far as visible through two opposite ports) Borescope Inspection of High-Pressure Turbine Nozzle Assembly Removal of the Burner Staging Valve (BSV) Installation of the Burner Staging Valve (BSV) Removal of the Hydromechanical Unit (HMU) Installation of the Hydromechanical Unit (HMU) Removal of the HJ7 Harness Removal of the HJ8 Harness Installation of the HJ7 Harness Installation of the HJ8 Harness Removal of the Electronic Control Unit (ECU)(4000KS) Installation of the Electronic Control Unit (ECU)(4000KS) Removal of the Engine Identification Connector Installation of the Engine Identification Connector Programming of the Identification Connector (Push-Pull Design) Operational Test of the FADEC on the Ground (with Engine Motoring)

R (1) Do the operational test of the FADEC on the ground (with engine R motoring) (Ref. AMM TASK 73-29-00-710-040).
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