Air Induction System

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