ENGINE EXHAUST SYSTEM - INTRODUCTION
Purpose
The engine exhaust system controls the direction of the engine exhaust gases.
The engine exhaust system has these subsystems:
- Turbine exhaust
- Thrust reverser (T/R)
- T/R actuation
- T/R indicating and fault detection.
OIL - INTRODUCTION
Purpose
The engine oil system does these functions:
- Supplies oil to lubricate, cool, and clean the engine bearings and gearboxes
- Supplies oil to decrease vibration at the engine bearings (oil damping)
- Gives heat to the engine fuel to prevent ice formation in the fuel.
The oil system has these subsystems:
- Storage
- Distribution
- Indicating.
ENGINE STARTING - INTRODUCTION
General
The engine starting system uses pneumatic power to turn the N2 shaft during an engine start. You also use the system to motor the engine.
The engine starting system operates on the ground and in the air. Flight deck switches and the EEC control the system.
The engine starting system uses these pneumatic power sources:
- Auxiliary power unit (APU)
- Ground power unit (GPU)
- Opposite operating engine.
ENGINE AIR - INTRODUCTION
Purpose
The engine air system controls the cooling air to the engine and the airflow through the compressors.
These are the engine air sub-systems:
- Cooling system
- Compressor control system.
The cooling system supplies air to cool the engine accessories and turbine case.
The compressor control system controls the airflow through the low pressure compressor (LPC) and high pressure compressor (HPC).