TM 55-1510-219-MTF
d.
Leak in oil lines or oil cooler.
e.
Defective pressure relief valve.
E6.
Fluctuating engine oil pressure.
a.
Insufficient or excess oil.
b.
Defective oil pressure indicating system
c.
Dirty oil filter.
d.
Defective pressure relief valve.
E7.
High oil temperature.
a.
Insufficient oil level.
b.
Defective oil temperature indicating system.
c.
Excessive idling in feather.
d.
Restriction or malfunction in oil cooler.
e.
Bypass diverter valve on oil to fuel heater malfunction.
f.
Heat shield failure.
E8.
Oil leak from compressor inlet.
a.
Defective preformed packing and plastic ring on oil filter
housing.
b.
Defective preformed packings on accessory gearbox.
E9.
Excessive oil discharge from overboard breather.
a.
Excess oil in tank.
b.
Defective preformed packing and plastic ring on oil filter.
c. Excessive back pressure in scavenge system due to
restrictions in oil scavenge tubes, pump screen, or oil-to-
fuel heater tubes.
d.
Defective or cocked centrifugal breather carbon seal.
E10.
Excessive engine oil consumption.
a.
Excess oil in tank.
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