R (2) Repeat the fault isolation procedure if the fault continues.

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 TASK 75-22-00-810-809
R Failure of the LPTC Valve on Engine 1
 1. Possible Causes
_______________
R - LPTC valve R - HMU R
 - ECU (4000KS)
 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
R  AMM  73-21-10-000-001 
R  AMM  73-21-10-400-001 
R
 AMM  73-21-60-000-001 
AMM  73-21-60-400-001 
AMM  73-29-00-710-040 
R  AMM  75-22-10-000-001 
R 
R  AMM  75-22-10-400-001 
R 
R
 3. Fault Confirmation__________________

Removal of the Hydromechanical Unit (HMU)
Installation of the Hydromechanical Unit (HMU)

Removal of the Electronic Control Unit (ECU)(4000KS)
Installation of the Electronic Control Unit
 (ECU)(4000KS)
Operational Test of the FADEC on the ground (with
 Engine Motoring)
Removal of the Low Pressure Turbine Active Clearance
Control Valve (LPTACC).
Installation of the Low Pressure Turbine Active
Clearance Control Valve (LPTACC).

A. Do the operational test of the FADEC 1B on the ground (with engine motoring) (Ref. AMM TASK 73-29-00-710-040).
 NOTE : If ECU 1820M36P02 or 1820M89P02 is installed, the confirmation
____ test is not required.
 4. Fault Isolation
_______________
R A. This fault is generated if the actual valve position disagrees with the
R demanded valve position for a set time interval.
R (1) If the failure message LPTC VLV (POS), HMU is not confirmed:
R (a) No maintenance action is required.

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R  (2) If the failure message LPTC VLV (POS), HMU is not confirmed but is 
R  repetitive: 
R  NOTE : No maintenance action is required unless the fault becomes too____ 
R  repetitive. 
R  - do the following steps until the fault is corrected. 
R  (a) Replace the LPTC valve (Ref. AMM TASK 75-22-10-000-001) and (Ref. 
R  AMM TASK 75-22-10-400-001). 
R  (b) If the fault continues during the subsequent flights: 
R  - replace the HMU (Ref. AMM TASK 73-21-10-000-001) and (Ref. AMM 
R  TASK 73-21-10-400-001). 
R  (c) If the fault continues during the subsequent flights: 
R  - replace the ECU (4000KS) (Ref. AMM TASK 73-21-60-000-001) and 
R  (Ref. AMM TASK 73-21-60-400-001). 
R  (3) If the failure message LPTC VLV (POS), HMU is confirmed: 
R  (a) Replace the LPTC valve (Ref. AMM TASK 75-22-10-000-001) and (Ref. 
R  AMM TASK 75-22-10-400-001). 
R  (b) If the fault continues: 
R  - replace the HMU (Ref. AMM TASK 73-21-10-000-001) and (Ref. AMM 
R  TASK 73-21-10-400-001). 
R  (c) If the fault continues: 
R  - replace the ECU (4000KS) (Ref. AMM TASK 73-21-60-000-001) and 
R  (Ref. AMM TASK 73-21-60-400-001). 
R
 B. Do the test given in Para. 3.A.

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 TASK 75-22-00-810-810
R Failure of the LPTC Valve on Engine 2
 1. Possible Causes
_______________
R - LPTC valve R - HMU R
 - ECU (4000KS)
 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------
　
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