THRUSH AIRCRAFT, INC – MODEL S2R-R1340
AIRCRAFT MAINTENANCE MANUAL
Effective: 01/01/08
2-15
Table 2-1: ENGINE PRESERVATION PROCEDURES
(Continued)
Engine Installed:
OPERATION PROCEDURE
10 to 30
Days
Over 30
Days
Engine
not
Installed:
Preservation
Run
Start the engine and then continue to run (on
normal service fuel) at idling speed for at
least 15 minutes, using the corrosion
preventive mixture as lubricant. At the end of
the run, open the throttle to attain a speed of
1500 RPM to ensure propeller rotation of
approximately 30 revolutions after the
mixture control is moved to idle cut-off.
CAUTION:
Do not operate in excess of 1500
RPM when engine is serviced with
preservative oil.
With the throttle advanced as described, and
with the oil temperature at not less than 95ºC
(203ºF) open the control valve to allow the
engine preservation mixture to be introduced
into the induction system. When the exhaust
stacks are smoking profusely, move the
mixture control to idle cut-off position to stop
the engine. After the engine has stopped,
close the control valve within five seconds.
X
X
Mixture
Drainage
While the engine is still warm, drain the
corrosion preventive mixture from the engine,
the lines, and the oil tank. Remove the
pressure and scavenge oil screens;
thoroughly clean and reinstall all parts
removed to facilitate draining.
X X
Spark Plugs
Disconnect the spark plug leads and remove
the spark plugs. Install protector caps on the
spark plug lead connectors. Clean the spark
plugs in clear, unleaded gasoline and dry
them with compressed air. Coat the spark
plug threads with a light oil or suitable rust
inhibitor and store them in a dry place.
Install protector caps on both ends of the
plugs if special cylindrical protective cartons
are not available.
X X X
