- examine the fuel filter cartridge, do a contamination check of the R fuel filter (Ref. AMM TASK 73-11-10-210-003),

 - visually inspect the PS3 sense line to make sure that there is no leakage or blockage (Ref. AMM TASK 72-00-00-200-026),

 - visually examine the VSV actuation system hardware, look for broken, loose or damaged hardware (Ref. AMM TASK 72-32-00-210-002).

 (a) If nothing is found:
 1 do the following inspection as necessary:
_

 - do a borescope inspection of the high-pressure compressor-rotor assembly (Ref. AMM TASK 72-31-00-290-002),

 - do a borescope inspection of the high-pressure turbine blades/nozzles (Ref. AMM TASK 72-51-00-290-004),

 - do a borescope inspection of the low pressure turbine (Ref. R AMM TASK 72-54-00-290-005) and (Ref. AMM TASK 72-54-00-290-R 006) and (Ref. AMM TASK 72-54-00-290-007) and (Ref. AMM TASK R 72-54-00-290-008) and (Ref. AMM TASK 72-54-00-210-005),

 - do a borescope inspection of the combustion chamber (Ref. R AMM TASK 72-41-00-290-001),

 - do a borescope inspection of the low pressure compressor (Ref. AMM TASK 72-21-00-290-003).
 2 If nothing is found:
_

 - do an inspection of the IP bleed check valve for free operation and condition of the flappers (Ref. AMM TASK 36-11-41-200-001).
 a If nothing is found:
_

 - replace the Hydromechanical Unit (HMU) (Ref. AMM TASK 73-21-10-000-002) and (Ref. AMM TASK 73-21-10-400-002).
 (4) If no failure message was found and if at the time of the event, the crew did not report symptoms such as stall, high EGT, sudden power loss, high vibrations:
 - examine the fuel filter cartridge, do a contamination check of the fuel filter (Ref. AMM TASK 73-11-10-000-003) and (Ref. AMM TASK 73-11-10-400-003) ,
R - do a check of the Master Magnetic Chip Detector for particles (Ref. R AMM TASK 79-00-00-281-002).
 (a) If nothing is found:
 - do a detailed visual inspection of the PS3 sense line (Ref. AMM TASK 72-00-00-200-026).
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 1 If nothing is found:

_

 - remove and check the IP bleed check valve for correct condition (Ref. AMM TASK 36-11-41-200-001).
 a If nothing is found:
_

 - replace the Hydromechanical Unit (HMU) (Ref. AMM TASK 73-21-10-000-002) and (Ref. AMM TASK 73-21-10-400-002) and the fuel pump (Ref. AMM TASK 73-11-10-000-003) and (Ref. AMM TASK 73-11-10-400-003).
 (b) If the fault occurred during engine operation in gravity feeding (boost pump off):
 - inspect the VALVE-AIR RELEASE, L WING TK (86QM) and fuel supply tubes in the wing fuel tank for condition,

 - repair or replace if necessary.

 (5) Do the operational test of the FADEC 1A and 1B (with the engine R motoring) (Ref. AMM TASK 73-29-00-710-040).
 B. Do a minimum idle check (Ref. AMM TASK 71-00-00-710-006).
 (1) No additional maintenance action is required if the fault is not confirmed.

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

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 Roll Back on Engine 2
 1. Possible Causes
_______________

 - VALVE-AIR RELEASE, R WING TK (87QM)

 - engine

 - ECU

 - low pressure fuel shut-off valve

 - IP bleed check valve

 - PS3 sense line

 - Hydromechanical Unit (HMU)

 - fuel pump

 2. Job Set-up Information
______________________

 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 28-24-00-720-001 AMM 36-11-41-200-001 AMM 71-00-00-710-006 AMM 72-00-00-200-026 AMM 72-21-00-290-003
AMM  72-31-00-290-002 
AMM  72-32-00-210-002 
R  AMM  72-41-00-290-001 
R 
AMM  72-51-00-290-004 
R  AMM  72-54-00-210-005 
R  AMM  72-54-00-290-005 
　
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本文鏈接地址：A320 Trouble Shooting Manual 排故手冊 發(fā)動機 ENGINE(3)