R (3) Inspect the IP check valve for condition or sticky flappers (Ref. AMM
R TASK 36-11-41-200-001)

R (a) If damage is found:
R - repair as necessary

R (b) If nothing is found, continue the trouble shooting as follows.

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R  (4) Do a visual check of the VSV linkage and look for any loose parts at 
R  VSV actuator bellcrank or rings mechanical corrections. 
R  (a) If damage is found: 
R  - repair as necessary 
R  (b) If nothing is found: 
R  - replace the HMU (Ref. AMM TASK 73-21-10-000-001) and (Ref. AMM 
R  TASK 73-21-10-400-001). 
R  1 If the fault continues during subsequent flights:_ 
R  - Replace the ECU (4000KS) (Ref. AMM TASK 73-21-60-000-001) 
R  and (Ref. AMM TASK 73-21-60-400-001). 
R  a If the fault continue during subsequent flights:_ 
R  - Do a borescope inspection of the HP compressor (Ref. AMM 
R  TASK 72-31-00-290-001). 
R  5. Close-up________ 
R  A. Test. 
R  (1) If the test made in Para. 3. A. was found within the limits: 
R  - Do the operational test of the FADEC A and B (with the engine 
R  motoring) (Ref. AMM TASK 73-29-00-710-040). 
R  (2) If the test made in Para. 3. A. was not found within the limits: 
R  - Do the Accel Check (Ref. AMM TASK 71-00-00-710-010). 
R  (a) If the fault is not confirmed: 
R  - no maintenance action is required. 
R  (b) If the fault continues: 
R  - repeat the fault isolation procedure.

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R TASK 71-00-00-810-812
R Fuel Leak at the Engine 1 Turbine Rear Frame Water Drain
R 1. Possible Causes_______________
R - HMU
R 2. Job Set-up Information______________________
R A. Referenced Information
R -------------------------------------------------------------------------------R REFERENCE DESIGNATION R -------------------------------------------------------------------------------
R  AMM 71-00-00-710-001  Dry Motoring Check 
R  AMM 71-00-00-710-001  Dry Motoring Check 
R  AMM 71-00-00-710-006  Minimum Idle Check 
R  AMM 71-00-00-710-006  Minimum Idle Check 
R  AMM 73-21-10-000-001  Removal of the Hydromechanical Unit (HMU) 
R  AMM 73-21-10-000-002  Removal of the Hydromechanical Unit (HMU) 
R  AMM 73-21-10-400-001  Installation of the Hydromechanical Unit (HMU) 
R  AMM 73-21-10-400-002  Installation of the Hydromechanical Unit (HMU) 
R  3. Fault Confirmation__________________ 
R  A. Not applicable. 
R  4. Fault Isolation_______________ 

R  A. If the fault symptom is identified by the crew observation fuel leak at 
R  the Turbine Rear Frame water drain: 
R  - do the Dry Motoring check (Ref. AMM TASK 71-00-00-710-001) (Ref. AMM 
R  TASK 71-00-00-710-001). 
R  - perform a minimum idle check (Ref. AMM TASK 71-00-00-710-006) (Ref. AMM 
R  TASK 71-00-00-710-006). 
R  (1) If fuel leak is present, replace the HMU (Ref. AMM TASK 73-21-10-000-
R  001) (Ref. AMM TASK 73-21-10-400-001) (Ref. AMM TASK 73-21-10-000-
R  002) (Ref. AMM TASK 73-21-10-400-002).

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R TASK 71-00-00-810-813
R Fuel Leak at the Engine 2 Turbine Rear Frame Water Drain
R 1. Possible Causes_______________
R - HMU
R 2. Job Set-up Information______________________
R A. Referenced Information
　
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