CHAPTER 79
PAGE 7
MAINTENANCE MANUAL EXTRA 300/SC
PAGE DATE: 1. August 2014
79-20-00 DISTRIBUTION
The hose and fitting installation is modified compared to the
standard Christen Inverted Oil System. The connections of
the Inverted Oil System still consist of AN (Army/Navy)
Standard fittings.
The flexible hoses of the oil cooling system are connected
by AN Standard fittings with equal size (8D), but different
connection angle.
Maintenance Practices
Before making installations and repairs to the aircraft plump-
ing, it is important to make accurate identification of plump-
ing materials.
79-20-01 Oil Cooler
Description and Operation
The lubrication system of the EXTRA 300/SC has a single
oil cooler which is mounted on the aft right hand side of the
engine. It is connected to the engine by hoses.
During operation the hot lubricating oil leaving the engine is
pumped by an engine-driven pump via a hose to the oil cooler.
The oil is cooled in passing through the oil cooler and
returned to the engine lubricating circuit through the return
hose.
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