Oil pressure less than 80 PSI on Engine 2

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1. Possible Causes
· XMTR-OIL PRESS ( 4003EN )
· ENGINE-2 ( 1000EM2 )
· oil pressure pump
· INDICATOR-POS, NO.4 SCAVENGE VALVE ( 4006EN )
2 Job Set-up Information
A. Referenced Information
REFERENCE DESIGNATION
Ref. AMM 71-00-20-000-040 Removal of the Power Plant
Ref. AMM 71-00-20-400-040 Installation of the Power Plant
Ref. AMM 79-00-00-200-011 Inspection of the Magnetic Chip Detectors for Debris
Ref. AMM 79-00-00-200-012 Inspection of the Oil Filters
Ref. AMM 79-21-41-000-010 Removal of the Oil Pressure Pump and Filter Assembly
Ref. AMM 79-21-41-400-010 Installation of the Oil Pressure Pump and Filter Assembly
Ref. AMM 79-23-51-000-010 Removal of the No. 4 Bearing Compartment Scavenge Valve
Ref. AMM 79-23-51-400-010 Installation of the No. 4 Bearing Compartment Scavenge Valve
Ref. AMM 79-33-15-000-010 Removal of the Oil Pressure Transmitter
Ref. AMM 79-33-15-400-010 Installation of the Oil Pressure Transmitter
3. Fault Confirmation
Subtask 79-33-00-710-101-A
A. Test
Not applicable.
4. Fault Isolation
Subtask 79-33-00-810-083-A
A. If the fault symptom is identified by the crew observation: ENG2-oil-pressure less than 80PSI:
(1) If the oil pressure is less than 60 PSI and the other indications normal:
- replace the XMTR-OIL PRESS ( 4003EN ) Ref. AMM 79-33-15-000-010 and Ref.
AMM 79-33-15-400-010 .
(2) If the oil pressure is between 60 PSI and 80 PSI:
· do the inspection of the magnetic chip detectors Ref. AMM 79-00-00-200-011 , and the fine
scavenge and pressure filters Ref. AMM 79-00-00-200-012 .
(a) If you find metal debris:
· replace the ENGINE-2 ( 1000EM2 ) Ref. AMM 71-00-20-000-040 and Ref.
AMM 71-00-20-400-040 .
(b) If you find no metal debris:
· replace the oil pressure pump Ref. AMM 79-21-41-000-010 and Ref.
AMM 79-21-41-400-010 .
1 If the fault continues:
· replace the INDICATOR-POS, NO.4 SCAVENGE VALVE ( 4006EN ) Ref.
AMM 79-23-51-000-010 and Ref. AMM 79-23-51-400-010 .
End of document [Rev.6 from Feb 2017] 2026.04.04 04:38:31 UTC