(3) If the IDG oil outlet temperature is also too high and/or the IDG OIL OVHT warning has been triggered:

 - do the related trouble shooting procedure.

 (4) If no IDG related fault is present and if the IDG oil outlet temperature is normal:

 (a) Get a sample of oil from the engine oil tank. If you can smell fuel presence in the engine oil:
 - replace the oil/fuel heat exchanger (Ref. AMM TASK 79-21-20-000-002) and (Ref. AMM TASK 79-21-20-400-002).
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 (b) Do a check of the lubrication unit magnetic plugs and screens (Ref. AMM TASK 79-21-10-210-002):
 - if no fault is found:
 1 do a functional test of the fuel return valve (Ref. AMM TASK
_
 73-11-50-720-001):

 - if the fuel return valve operates as expected: . no maintenance action is required,

 - if the fuel return valve does not operate during the test: . replace the valve (Ref. AMM TASK 73-11-50-000-002) and (Ref. AMM TASK 73-11-50-400-002).

 2 if no fault is found:
_
 - replace the engine oil temperature sensor (Ref. AMM TASK 79-31-40-000-002) and (Ref. AMM TASK 79-31-40-400-002).
 3 if the fault continues:
_
 - replace the ECU (4000KS) (Ref. AMM TASK 73-21-60-000-001) and (Ref. AMM TASK 73-21-60-400-001).
 4 if the fault continues:
_
 - replace the main oil/fuel heat exchanger (Ref. AMM TASK 79-21-20-000-002) and (Ref. AMM TASK 79-21-20-400-002).
 5 if the fault continues:
_
 - do an oil analysis to make sure the engine oil tank was not serviced with a non approved product.
 B. Do a minimum idle check (Ref. AMM TASK 71-00-00-710-006).
 (1) No additionnal maintenance action is required if the fault is not confirmed.

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

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 TASK 79-00-00-810-836
 Low Oil Pressure Indication on Engine 1
 1. Possible Causes
_______________
 - SW-LOW OIL PRESS (4000EN)

 - engine
 - oil tank

 - lubrication unit

 - wiring

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 71-00-00-710-006 Minimum Idle Check R AMM 71-00-00-790-002 Fuel or Hydraulic or Oil Leakage Limits AMM 72-00-00-200-008 Inspection/Check After the Engine has Exceeded the
 Operational Limits AMM 72-56-00-000-001 Removal of the Flame Arrestor and Flange Assembly AMM 72-56-00-210-002 Inspection/Check of the Turbine Frame Assembly AMM 72-56-00-400-001 Installation of the Flame Arrestor and Flange
 Assembly
 AMM 73-25-34-000-040 Removal of the Engine Interface Unit (EIU)
 AMM 73-25-34-400-040 Installation of the Engine Interface Unit (EIU)

R R AMM 79-00-00-281-002 Check of the Electrical Master Chip Detector for
 Particles
 AMM 79-11-10-000-005 Removal of the Oil Tank
 AMM 79-11-10-400-005 Installation of the Oil Tank
 AMM 79-21-10-000-004 Removal of the Lubrication Unit
 AMM 79-21-10-400-004 Installation of the Lubrication Unit

R AMM 79-34-15-000-041 Removal of the Low Oil Pressure Switch (4000EN) AMM 79-34-15-400-041 Installation of the Low Oil Pressure Switch (4000EN) ASM 79-36/01
 3. Fault Confirmation
__________________
R A. Not Applicable R
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 4. Fault Isolation
_______________
R A. The ECAM warning is triggered if the low oil pressure switch output
R indicates an oil pressure lower than 13 PSI while the engine speed is
R above idle.

R (1) If actual low oil pressure is confirmed by the crew report (oil
R pressure indication flashing green on lower ECAM):
R - do an inspection (Ref. AMM TASK 72-00-00-200-008) after the engine
R has exceeded the operational limits.

R (a) If the engine is still operable:
　
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