Engine Operational Check; System And Component Servicing - Thrush Aircraft S2R–T660 Maintenance Manual

When the engine attains idle rpm:
K. Engine Starter Switch and Ignition Switch - Off
L. Oil Pressure - Check 60 PSIG Minimum
M. Fuel Auxiliary Pump - Off
N. Fuel Pressure from Engine Driven Pump - Check 5 PSI Minimum
O. Generator Charging – Check
Fill hopper and hold the elevator control firmly full up during all
high power ground operations to keep aircraft from nosing over.
Refer to Section Four for specific operational checks and/or Pratt & Whitney Maintenance Manual.
Before proceeding with a ground run up, be sure that the propeller system is purged by feathering
the propeller once or twice with the power control lever in idle position.
The following procedure should be used to check the propeller overspeed governor.
A. Place the propeller lever in full increase RPM position (forward).
B. Turn prop test switch on.
C. Increase RPM with the power lever until governing occurs. This should occur at 1598
±20 RPM. (In no case should any engine limitations be exceeded.)
D. Reduce power back to idle.
E. Turn prop test switch off.
If RPM is not governed at 1598 ±20 RPM with the prop test switch
on, consult Section IV of this manual for adjustment of the
overspeed-governor.

SYSTEM AND COMPONENT SERVICING

Servicing procedures contained in this Section are confined to those maintenance actions that
occur with routine frequency and require a reasonably short period of time to accomplish. Servicing
practices and maintenance to aircraft systems and components that require less frequent attention
are contained in the appropriate Section of this manual.
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THRUSH AICRAFT INC - T660 TURBO THRUSH
AIRCRAFT MAINTENANCE MANUAL

ENGINE OPERATIONAL CHECK

** CAUTION **
*NOTE*
Effective: 12/17/03