What Does APU Stand For?
APU stands for Auxiliary Power Unit
An Auxiliary Power Unit (APU) is a device used in aircraft and other vehicles to provide energy for various functions when the main engines are not operating. It typically supplies electrical power and pneumatic energy for engine start, air conditioning, lighting, and other onboard systems, enhancing operational efficiency and safety. APUs are essential for ground operations, allowing vehicles to maintain necessary power levels without relying on the primary engines.
Added on 14th April 2008 | Last edited on 16th June 2025 | Edit Acronym