Thrush Aircraft S2R-R1340 Maintenance Manual page 33

Table 2-1: ENGINE PRESERVATION PROCEDURES (Continued)
OPERATION
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
mixture control is moved to idle cut-off.
CAUTION: Do not operate in excess of 1500
Preservation
RPM
Run
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.
While the engine is still warm, drain the
corrosion preventive mixture from the engine,
Mixture
the lines, and the oil tank.
Drainage
pressure
thoroughly clean and reinstall all parts
removed to facilitate draining.
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
Spark Plugs
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.
Effective: 01/01/08
THRUSH AIRCRAFT, INC – MODEL S2R-R1340
AIRCRAFT MAINTENANCE MANUAL
PROCEDURE
30 revolutions
when engine
and scavenge
after the
is serviced with
Remove the
oil screens;
Engine
Engine Installed:
10 to 30 Over 30
Installed:
Days Days
X
X
X X
2-15
not
X
X
X