Turbine Powered Auxiliary Power Unit Flashcards
1
Q
Where are most APUs located in modern jet transport aircraft?
A
In the tail cone of the fuselage
2
Q
What is the function of an APU?
A
An APU provides electric power and compressed air when the main engines are not operating
3
Q
What are two sources of compressed air from an APU?
A
From bleed air from the APU turbine compressor, or from a load compressor driven by a free turbine in the engine
4
Q
Where in maintenance information based on the ATA-100 system would you find instructions for inspecting and servicing the engine of an airborne APU?
A
In section 49 20
5
Q
How is most of the troubleshooting done for a modern APU?
A
By the fault codes generated by the FADEC
