SY103 Flashcards
Accessory Compartment contains:
accessory gearbox, starter, oil tank, and battery
Gas Generation section contains:
compressor inlet, compressor, combustion chamber, and compressor turbine
Explain Gas Generation flow
Inlet air enters the engine through the compressor inlet and is compressed by a four-stage axial flow compressor and a single stage centrifugal flow compressor. The compressed air is transferred to the combustion chamber. In the combustion chamber the compressed air is mixed with fuel and ignited. Igniting the mixture causes the gases to expand. The expanding gases drive the compressor turbine, which perpetuates the cycle.
Power Turbine section contains:
power turbines, exhaust case, reduction gearbox, and the propeller shaft
Elements necessary for engine operation
air, fuel, and heat
Engine exhaust system contains
exhaust ports and exhaust stacks
The starter provides
initial air flow
The fuel management unit (FMU) provides
fuel
The ignition system provides
the initial heat source
The ignition system consists of
an ignition exciter, two high voltage igniter cables, and two spark igniters.
PMU automatically maintains
Interstage Turbine Temperature (ITT), torque, and RPM limitations (N1 and NP)
Primary power source for the PMU is the
Permanent Magnet Alternator (PMA), mounted on the reduction gearbox
The PMU is located
underneath the engine, in the accessory compartment
The oil system provides a steady flow of filtered oil to
the engine bearings, reduction gears, accessory drives, and the propeller.
The oil system contains
a pressure system, scavenge system, and cooling system.
The chip detector sensor
detects metallic particles in the oil and warns the pilot of possible gear damage.
Oil level must be serviced within
30 minutes of engine shutdown.