Aviation Mechanic - General, Airframe, and Powerplant › III. Powerplant › Task B. Turbine Engines

AM.III.B.K10

Knowledge

Auxiliary power unit(s).

Study note

Get a short, cited explanation of this element written from the FAA handbooks: the core idea, the numbers that matter, common test traps, and a quick self-check.

From the FAA library

Aviation Maintenance Technician Handbook - Powerplant p. 2-36
Chapter 2: Engine Fuel & Fuel Metering Systems › Turbine Engine Fuel System—General Requirements › FADEC for an Auxiliary Power Unit
FADEC for an Auxiliary Power Unit An APU engine uses the aircraft fuel system to supply fuel to the fuel control. An electric boost pump may be used to supply fuel under pressure to the control. The fuel usually passes…
Aviation Maintenance Technician Handbook - Powerplant p. 5-9
Chapter 5: Engine Starting Systems › Gas Turbine Engine Starters
using the combustion energy of jet A fuel and compressed air. The starter consists of a turbine-driven power unit and auxiliary fuel, air, and ignition systems. Operation of this type starter is, in most installations, fully automatic; actuation ... starter generator systems. Direct cranking electric starting systems are used mostly on small turbine engines, such as Auxiliary Power Units (APUs), and some small turboshaft engines. Many gas turbine aircraft are equipped with starter generator systems. Starter generator starting systems…
Pilot's Handbook of Aeronautical Knowledge p. 7-21
Chapter 7: Aircraft Systems › Turbine Engines › Turboshaft
turboshaft engines are widely used as auxiliary power units on large aircraft. Figure 7-23. Turbojet engine. Figure 7-24. Turboprop engine. Figure 7-25. Turbofan engine. Figure 7-26. Turboshaft engine. Turbine Engine Instruments Engine instruments that indicate…