Glossary
Aircraft & Engineering
Auxiliary Power Unit (APU)
Embed This Widget
Add the script tag and a data attribute to embed this widget.
Embed via iframe for maximum compatibility.
<iframe src="https://airportfyi.com/iframe/glossary/apu/" width="420" height="400" frameborder="0" style="border:0;border-radius:10px;max-width:100%" loading="lazy"></iframe>Paste this URL in WordPress, Medium, or any oEmbed-compatible platform.
https://airportfyi.com/glossary/apu/Add a dynamic SVG badge to your README or docs.
[](https://airportfyi.com/glossary/apu/)Use the native HTML custom element.
Definition
A small engine on the aircraft that provides electrical power and air conditioning on the ground
Related Terms
Mentioned In
Frequently Asked Questions
What is Auxiliary Power Unit (APU)?
A small engine on the aircraft that provides electrical power and air conditioning on the ground
What does APU stand for?
APU stands for Auxiliary Power Unit (APU). A small engine on the aircraft that provides electrical power and air conditioning on the ground
How does Auxiliary Power Unit (APU) relate to other aviation concepts?
Auxiliary Power Unit (APU) is closely related to Bleed Air and Turbofan Engine, among other key aviation concepts.
More in Aircraft & Engineering
Avionics
Bleed Air
Composite Materials
Empennage (Tail Section)
ETOPS Rating
Flight Management System (FMS)
Fly-By-Wire (FBW)
Fuselage
Landing Gear
Mach Number (M)
Maximum Takeoff Weight (MTOW)
Narrow-Body Aircraft
Pressurization
Range (Aircraft)
Regional Jet (RJ)
Service Ceiling
Stall Speed (Vs)
Traffic Collision Avoidance System (TCAS)
Turbofan Engine
Turboprop
Turboshaft Engine
Wide-Body Aircraft
Winglet