Thrush Aircraft S2R-T660, Maintenance Manual

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THRUSH AIRCRAFT INC - T660 TURBO THRUSH
AIRCRAFT MAINTENANCE MANUAL
These components are driven by the compressor by means of a coupling shaft, which extends the
drive through a tube at the center of the oil tank. The rear location of accessories provides for a
clean engine and simplifies maintenance procedures.
The engine oil supply is contained in an integral oil tank, which forms the rear section of the
compressor inlet case. The tank has a total capacity of 2.3 US gallons and is provided with a
dipstick.
An engine-driven fuel pump further pressurizes fuel supplied to the engine from an external source
and the fuel control unit (FCU) controls its flow to the fuel manifold.
The power turbine drives a propeller through a two-stage planetary reduction gearbox located at the
front of the engine. The gearbox embodies an integral torquemeter device, which is instrumented to
provide an accurate indication of engine power. A chip detector is installed at the bottom of the
gearbox.
The propeller reversing installation is comprised of a single-acting hydraulic propeller that is
controlled by a propeller governor which combines the functions of a normal constant speed unit
(CSU), a reversing valve and a power turbine (Nf) governor. A mechanical linkage between the
propeller governor Beta control valve and the air bleed link enables the FCU and the propeller
governor to modify engine power to maintain power turbine speed at a speed slightly less than the
selected rpm when operating in the Beta control range.
ENGINE BUILDUP
Engine build-up consists of the removal of accessories and equipment from the old engine and
installing them on the new engine. Consult the Engine Maintenance Manual for removal and
replacement procedures. After all accessories and equipment have been installed on the new
engine, proceed as follows:
** CAUTION **
Consult the Engine Maintenance Manual before removing the
new engine from the shipping container.
Effective: 12/17/03
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