Ground Power Unit
Also written as: GPU — Ground Power Unit
A mobile or fixed electrical power source connected to an aircraft while it is on the ground, supplying power without the aircraft's own engines or APU running.
Full Definition
A Ground Power Unit (GPU) provides electrical power to a parked aircraft, enabling lighting, avionics, cabin systems, and maintenance activities without requiring the aircraft's Auxiliary Power Unit (APU) or main engines to operate. GPUs reduce fuel burn, emissions, and noise on the apron. Editors should note the acronym GPU and distinguish it from the aircraft's own APU (Auxiliary Power Unit). In documents addressing environmental compliance, the use of ground power over APU operation is frequently discussed.
Usage
Usage note: Distinguish clearly from APU (Auxiliary Power Unit), which is an onboard aircraft system. GPU refers specifically to an external ground-based unit.
In Context
- "The handling agent connected the GPU to the aircraft within five minutes of chocks-on." — Ground handling service level agreement
- "Airport policy requires GPU use in preference to APU operation at all stands equipped with fixed electrical ground power." — Environmental compliance document