AIRPLANE
OPERATIONS
MANUAL
GROUND SERVICING
REVISION 38
1-12-30
Page
1
Code
01
AOM-145/1114
ENGINE OIL SERVICING
The engine oil tank features an oil level sight gage and an oil level/low
level warning sensor. To check oil level in the engine, open its access
door and observe the sight glass. It must never exceed the FULL
mark.
The engine oil consumption rate is considered high when it increases
above the typical consumption rate for the engine, or is equal to or
more than 10.1 ounces per hour (0.32 quarts per hour or 300cc per
hour). Engine oil consumption rates may increase as engine
hours/cycles increase.
High oil consumption indicates something is not functioning properly or
possibly a leak which should be addressed by maintenance personnel
when convenient. In the absence of other problems associated with
the high oil consumption rate there is no mandatory action. Engine oil
consumption rates can increase as engine hours/cycles increase.
To fill the tank with oil, proceed as follows:
– Remove the filler cap from the engine oil tank.
– There is an O-ring on the filler cap that must be checked for dents,
cracks or breakage. Remove and visually inspect this O-ring.
– Replace the O-ring, if necessary.
– Prior to the first engine run of the day, pour oil through the filler
neck observing that the one quart mark on the sight gauge is not
exceeded.
– Prior to other flights of the day, if the quantity is below the three
quart mark on the sight gauge, fill the oil tank until the oil reaches
the two quart mark on the sight gauge.
NOTE: Servicing the oil tank to levels other than above could cause
an indication of a high oil pressure condition during takeoff.
– After filling the tank, put the O-ring and the filler cap back in place
and make sure that it is properly installed and tightened.
NOTE: Assure an adequate oil quantity to avoid low oil level indication
in flight (8 quarts recommended).
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