Dry Motoring Run - THRUSH S2R-T34 Airplane Flight Manual

Thrush Aircraft Inc
Albany, GA
Whenever the gas generator fails to light up within 10 Seconds
after moving the fuel lever to the LOW IDLE / GROUND IDLE
position, cut off fuel, starter, and ignition. Allow a 30 second fuel
draining period 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. (See the following Section.)
11. Engine Starter Switch and Ignition Switches – OFF.
12. Oil Pressure – CHECK, 85 PSIG Minimum.
13. Fuel Aux. Pump – OFF.
14. Fuel Pressure from Engine Driven Pump – CHECK 5 PSI Minimum
15. Generator – ON and CHECK charging normally.
16. P-3 Heater Switch – ON (if installed) (When the free air temperature is below 40°F.)
17. Warning Lights – CHECK and consider.

DRY MOTORING RUN:

The following procedure is used to clear an engine at any time when it is deemed
necessary to remove internally trapped fuel and vapor or if there is evidence of a fire
within the engine. Air passing through the engine serves to purge fuel, vapor, or fire
from the combustion sections, gas generator turbine, power turbine, and exhaust system.
1. Fuel Condition Lever – CUT OFF
2. Ignition Switch – OFF
3. Master Switch – ON
4. Fuel Valve – ON
5. Fuel Auxiliary Pump Switch – ON, to provide lubrication for the engine driven fuel
pumping elements.
6. Engine Starter Switch – ON
If the fire should persist as indicated by
sustained interturbine temperature, close the
fuel system shutoff valve immediately and
continue motoring.
7. Maintain the starter operation for the desired duration. (Maximum starter duration is 3
minutes.)
8. Engine Starter Switch – OF
FAA APPROVED: Apr. 10, 2007
Model S2R-T34
AIRPLANE FLIGHT MANUAL
CAUTION
WARNING
SECTION II
NORMAL PROCEDURES
Revision 3, SECTION II-6