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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Auxiliary Power Unit Shroud Drain Line Installation-Rework Modification
Auxiliary Power Unit Shroud Drain Line Installation-Rework Modification

Mfr Part#
346U8401-903

Spacer-Drain Mast, Auxiliary Power Unit Shroud Drain
Spacer-Drain Mast, Auxiliary Power Unit Shroud Drain
The Boeing Company

Mfr Part#
346W2005-6

Tube Assembly - Auxiliary Power Unit Fuel Feed - Wing.
Tube Assembly - Auxiliary Power Unit Fuel Feed - Wing.
The Boeing Company

Mfr Part#
346T0010-16

Doubler-Auxiliary Power Unit Shroud Tube Repair
Doubler-Auxiliary Power Unit Shroud Tube Repair
The Boeing Company

Mfr Part#
346A2005-1

Doubler-Auxiliary Power Unit Shroud Tube Repair
Doubler-Auxiliary Power Unit Shroud Tube Repair
The Boeing Company

Mfr Part#
346A2005-2

Bracket-Auxiliary Power Unit Fuel Feed Support
Bracket-Auxiliary Power Unit Fuel Feed Support
The Boeing Company

Mfr Part#
346W2509-1001

Tube Assembly APU Drain
Tube Assembly APU Drain
The Boeing Company

Mfr Part#
346W2710-72

Tube Assembly APU Drain
Tube Assembly APU Drain
The Boeing Company

Mfr Part#
346W2710-71

Tube Assembly APU Drain
Tube Assembly APU Drain
The Boeing Company

Mfr Part#
346W2710-73

Tube Assembly APU Drain
Tube Assembly APU Drain
The Boeing Company

Mfr Part#
346W2710-70

Actuator Enclosure Assembly, Inlet
Actuator Enclosure Assembly, Inlet
The Boeing Company

Mfr Part#
353A4230-1

Door Assembly, Auxiliary Power Unit Inlet
Door Assembly, Auxiliary Power Unit Inlet
The Boeing Company

Mfr Part#
353A4220-1

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

Mfr Part#
353A4220-2

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

Mfr Part#
353A2082-1

Inlet Assembly, Auxiliary Power Unit
Inlet Assembly, Auxiliary Power Unit
The Boeing Company

Mfr Part#
353A4003-2

Interconnect Frame Assembly - Air Inlet, Auxiliary Power Unit
Interconnect Frame Assembly - Air Inlet, Auxiliary Power Unit
The Boeing Company

Mfr Part#
353A2084-1

Inlet Assembly, Auxiliary Power Unit
Inlet Assembly, Auxiliary Power Unit
The Boeing Company

Mfr Part#
353A4003-6

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

Mfr Part#
353A4020-4

Actuator Enclosure Assembly, Auxiliary Power Unit Inlet
Actuator Enclosure Assembly, Auxiliary Power Unit Inlet
The Boeing Company

Mfr Part#
353A4230-2

Adapter Installation Air Inlet - Auxiliary Power Unit, 737
Adapter Installation Air Inlet - Auxiliary Power Unit, 737

Mfr Part#
353A1000-4#A

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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