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T-34C AIRCRAFT SYSTEMS FAMILIARIZATION
CHAPTER THREE
WORKBOOK
302.
AIR INDUCTION SYSTEM
The engine receives ram air for combustion from an engine air intake located in the lower right
front of the engine cowling. The air is ducted to the compressor inlet case. Located within the
engine air intake duct is an inertial separator which prevents freezing precipitation from
collecting on the engine FOD screen. A manually operated door allows solid particles to be
separated from the inlet air and vented overboard. This door is controlled by a T-handle located
on the right subpanel in the front cockpit only, and placarded ENGINE AIR INLET BYPASS
DOOR. The T-handle is mechanically linked to the door and is pulled to open the door and
pushed to close it. During normal operation the separator door is closed.
The accessory air inlet is located in the lower left front of the engine cowling. This duct directs
cooling air to the oil cooler, starter/generator, engine-driven accessories, and the cockpit.
Figure 3-1 Air Induction/Accessory Cooling
303.
ENGINE OIL SYSTEM
The engine oil system is a pressure type system providing a constant supply of clean oil to cool
and lubricate the engine during its operation. Within the engine, all bearings are lubricated by
the pressure method, while the accessory gearbox and reduction gearbox are lubricated by the
pressure and "splash and spray" method.
PT6A-25 AIR/OIL/IGNITION SYSTEMS
3-3


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