Airframe APUs

Aircraft auxiliary power units (APUs) provide power to various systems when the main engines are not running. These units offer an efficient power supply for an aircraft, ensuring smooth operations and enhanced safety. Trusted manufacturers of APUs in aviation like Boeing, BAE Systems Controls Inc., and Honeywell guarantee quality and durable products meant to withstand the harsh conditions seen by aircraft. Browse our selection of aircraft APUs to find the perfect solution for your needs.
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Valve-Collector Auxiliary Power Unit/Airframe Rotation-0
Valve-Collector Auxiliary Power Unit/Airframe Rotation-0

Mfr Part#
3912237-01

Racket-Vent And Refuel Shrouds, Auxiliary Fuel
Racket-Vent And Refuel Shrouds, Auxiliary Fuel

Mfr Part#
342W2511-1

P300 Auxiliary Power Panel
P300 Auxiliary Power Panel
GE Aviation Systems Ltd

Mfr Part#
3501ELM21

Inlet Door Housing Casting-Auxiliary Power Unit
Inlet Door Housing Casting-Auxiliary Power Unit

Mfr Part#
353A4020-2

Inlet Door Housing Casting - Auxiliary Power Unit
Inlet Door Housing Casting - Auxiliary Power Unit
The Boeing Company

Mfr Part#
353A4020-3

Aft Plenum Assembly, Auxiliary Power Unit Inlet
Aft Plenum Assembly, Auxiliary Power Unit Inlet

Mfr Part#
353A2082-2

Forward Plenum Bond Assembly - Air Inlet, Auxiliary Power Unit
Forward Plenum Bond Assembly - Air Inlet, Auxiliary Power Unit

Mfr Part#
353A2086-1

Port Door Assembly, Auxiliary Power Unit Inlet
Port Door Assembly, Auxiliary Power Unit Inlet

Mfr Part#
353A4201-1

Port Assembly, Auxiliary Power Unit Inlet
Port Assembly, Auxiliary Power Unit Inlet

Mfr Part#
353A4210-2

Inlet Door Housing Casting - Auxiliary Power Unit
Inlet Door Housing Casting - Auxiliary Power Unit

Mfr Part#
353A4020-1

Forward Plenum Bond Assembly - Air Inlet, Auxiliary Power Unit
Forward Plenum Bond Assembly - Air Inlet, Auxiliary Power Unit
The Boeing Company

Mfr Part#
353A2086-3

Duct Station 1088 Inboard Bracket, Auxiliary Power Unit Inlet
Duct Station 1088 Inboard Bracket, Auxiliary Power Unit Inlet

Mfr Part#
353A2094-17

Port Bond Lower, Auxiliary Power Unit Inlet Port
Port Bond Lower, Auxiliary Power Unit Inlet Port

Mfr Part#
353A4213-3

Core, Auxiliary Power Unit Inlet Door
Core, Auxiliary Power Unit Inlet Door

Mfr Part#
353A4221-2

Port Closeout Plate-Actuator, Auxiliary Power Unit Inlet
Port Closeout Plate-Actuator, Auxiliary Power Unit Inlet

Mfr Part#
353A4232-1

Clip, Inlet Duct - Auxiliary Power Unit
Clip, Inlet Duct - Auxiliary Power Unit
The Boeing Company

Mfr Part#
353A4060-2

Hinge Fitting - Auxiliary Power Unit Air Inlet Door
Hinge Fitting - Auxiliary Power Unit Air Inlet Door

Mfr Part#
353A4222-8

Port Closeout Plate-Actuator, Auxiliary Power Unit Inlet
Port Closeout Plate-Actuator, Auxiliary Power Unit Inlet
The Boeing Company

Mfr Part#
353A4232-2

Hinge Assembly, Auxiliary Power Unit Air Inlet Door
Hinge Assembly, Auxiliary Power Unit Air Inlet Door

Mfr Part#
353A4222-1

Backup Sleeve Forward, Auxiliary Power Unit Inlet Diffuser
Backup Sleeve Forward, Auxiliary Power Unit Inlet Diffuser

Mfr Part#
353A3022-1

Frequently Asked Questions

What is an APU in an aircraft?

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An APU in an aircraft is a device that provides energy for functions other than propulsion, including powering hydraulic systems, air conditioning, and airframe electrical systems.

How does an aircraft APU work?

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An APU in aviation works by generating electrical power, providing air for starting engines, and powering other systems when the main engines are off.

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