E8.
E9.
E10.
E11.
E12.
TM 1-1510-225-MTF
Low engine oil pressure.
a. Insufficient oil.
b. Defective oil pressure indicating system.
c. Dirty oil filter.
d. Leak in oil lines or oil cooler.
e. Defective pressure relief valve.
Fluctuating engine oil pressure.
a. Insufficient or excess oil.
b. Defective oil pressure indicator.
c. Dirty oil filter.
d. Defective pressure relief valve.
High oil temperature.
a. Insufficient oil supply.
b. Defective oil temperature indicator.
c. Excessive idling in feather.
d. Restriction in oil cooler.
e. Cooling air flow blocked.
Oil leak from compressor inlet.
a. Defective preformed packing and plastic ring on
oil filter housing.
b. Defective preformed packings on accessory gear-
box.
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.
3-17
