Thrush Aircraft S2R-T660, Maintenance Manual

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THRUSH AIRCRAFT INC - T660 TURBO THRUSH
AIRCRAFT MAINTENANCE MANUAL
After a complete visual inspection has been accomplished, the following checklist may be used for the
external prestart check. The aircraft should be headed into the wind and should have the wheel
chocks in place.
A. A fire extinguisher must be readily available in the event of an engine fire.
B. Check the engine oil level. Assure that the oil system has been serviced with the correct
grade of oil.
C. Verify that the internal control lock has been removed and that the controls operate freely.
D. Set the parking brake.
E. Check the fuel quantity in both tanks.
F. Set the trim tabs for takeoff.
G. Clear the area of all personnel.
STARTING ENGINE
Use the following procedure to start the PT6A engine.
A. Battery and Generator Switches - On
B. Power Lever - Idle
C. Propeller Lever - Feather
D. Fuel Condition Lever - Cut Off
E. Fuel Shutoff Valve – On
F. Fuel Auxiliary Pump Switch - On
G. Fuel Inlet Pressure Indicator - Check 5 PSI Minimum
H. Engine Starter Switch - On
The minimum speed to obtain a satisfactory light is 13% Ng.
I. After approximately 5 seconds of motoring at the stabilized gas generator speed, turn the
Ignition Switch On and move the Condition Lever to the Ground (low) Idle position.
J. Observe that the engine accelerates normally to idle RPM and the maximum allowable
Inter-turbine temperature-starting limit is not exceeded.
** CAUTION **
Whenever the gas generator fails to light up within 10 seconds after moving the fuel condition lever to the
ground (low) idle position: fuel condition lever – idle cutoff, ignition switch - off, starter – off. Allow a 30-
second fuel draining period that is followed by a 15-second dry motoring run before attempting another
start. If for any reason a starting attempt is discontinued, allow the engine to come to a complete stop and
then accomplish a Dry Motoring Run as described on page 2-5 under Engine Fires. That procedure is also
referred to as Dry Motoring run.
Effective: 12/17/03
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