R 1_ Do a check for external oil leak and oil dripping from the
R drain mast (Ref. AMM TASK 71-00-00-790-002).
R 2_ Do a check for heavy oil discharge from the center vent tube
R through the flame arrestor into the center body.
R a_ If an excessive oil discharge from the center vent is
R confirmed and the oil consumption is also excessive:
R - do the trouble shooting as per TSM entry: ATA79 HIGH OIL
R CONSUMPTION.
R 3_ Do a check of the lubrication unit magnetic plugs and screens
R (Ref. AMM TASK 79-00-00-281-002).
R a_ If nothing is found:
R - remove the AGB drain plug,
R - do a check for abnormal oil quantity.
R b_ If there is more than one quart of oil in the AGB:
R - do a check for oil scavenge line blockage.
R c_ If the AGB oil scavenge line is found blocked:
R - clean or repair as required.
R d_ If the AGB oil scavenge line is not found blocked:
R - do a check for obstruction of the aft sump flame arrestor
R (Ref. AMM TASK 72-56-00-210-002).
R e_ If obstruction of the grid is greater than 50%:
R - replace the flame arrestor (Ref. AMM TASK 72-56-00-000-R 001) and (Ref. AMM TASK 72-56-00-400-001).
R f_ If nothing is found on flame arrestor:
R - check the oil tank strainer for blockage.
R g_ If the strainer is blocked:
R - replace the oil tank (Ref. AMM TASK 79-11-10-000-005) and
R (Ref. AMM TASK 79-11-10-400-005).
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R h_ If nothing is found in the strainer:
R - replace the lubrication unit (Ref. AMM TASK 79-21-10-000-
R 004) and (Ref. AMM TASK 79-21-10-400-004).
R (2) If actual low oil pressure is not confirmed (indicating system
R failure):
R - replace the SW-LOW OIL PRESS (4000EN) (Ref. AMM TASK 79-34-15-000-
R 041) and (Ref. AMM TASK 79-34-15-400-041).
R - do a check of the wiring between the low oil pressure switch
R (4000EN) and the EIU-1 (1KS1) pin AA/7A (Ref. ASM 79-36/01) for
R short to ground,
R - repair, clean or replace wiring or connectors as required.
R (a) If the fault continues:
R - replace the EIU-1 (1KS1) (Ref. AMM TASK 73-25-34-000-040) and
R (Ref. AMM TASK 73-25-34-400-040).
R
R 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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TASK 79-00-00-810-837
Low Oil Pressure Indication on Engine 2
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
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