TM 55-1510-215-MTF
E9. High engine oil pressure.
a.
Defective oil pressure indicating system.
b.
Defective pressure relief valve.
E10. 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.
f.
Excessive hot air leakage through faulty heat shielding.
E11. Fluctuating engine oil pressure.
a.
Insufficient or excess oil.
b.
Defective oil pressure indicating system.
c.
Dirty oil filter.
d. Defective pressure relief valve.
E12. High oil temperature.
a. Insufficient oil supply.
b. Defective oil temperature indicating system.
c. Excessive idling in feather.
d. Restriction in oil cooler.
e. Excessive hot air leakage through faulty heat
shielding.
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