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 Door Assembly
Auxiliary Power Unit Door Assembly
The Boeing Company

Mfr Part#
148A6350-9105

Auxiliary Power Unit Door Assembly
Auxiliary Power Unit Door Assembly

Mfr Part#
148A6350-97

Auxiliary Power Unit Door Assembly (-800)
Auxiliary Power Unit Door Assembly (-800)
The Boeing Company

Mfr Part#
148A6350-984

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

Mfr Part#
148A6355Y174

Auxiliary Power Unit Door Skin
Auxiliary Power Unit Door Skin

Mfr Part#
148A6375-11

Auxiliary Power Unit Door Assembly/Installation
Auxiliary Power Unit Door Assembly/Installation

Mfr Part#
148N6660

Auxiliary Panel Assembly-L/H
Auxiliary Panel Assembly-L/H

Mfr Part#
148T0251-7

Auxiliary Panel Assembly-R/H
Auxiliary Panel Assembly-R/H

Mfr Part#
148T0251-8

Door-Bonded Part-Air Driven Unit
Door-Bonded Part-Air Driven Unit
The Boeing Company

Mfr Part#
149W5601Y11

Outlet Unit, Alternating Current/USB
Outlet Unit, Alternating Current/USB

Mfr Part#
1501-210-19

Outlet Unit, AC/28 VDC In, Hi-Power USB
Outlet Unit, AC/28 VDC In, Hi-Power USB

Mfr Part#
1501-305-105

Unit Ay
Unit Ay

Mfr Part#
251T2210-3

Unit Ay
Unit Ay

Mfr Part#
251T2245-3

Feel Unit Installation
Feel Unit Installation

Mfr Part#
251T2200-5

Unit Ay
Unit Ay

Mfr Part#
251T2210-4

Unit Ay
Unit Ay

Mfr Part#
251T2245-4

Feel Unit Installation
Feel Unit Installation

Mfr Part#
251T2200-5005

PDU Ay
PDU Ay

Mfr Part#
256T2610-1

PDU Ay
PDU Ay

Mfr Part#
256T3110-1

Housing Assembly - Power Drive Unit, Flap Alternating Current
Housing Assembly - Power Drive Unit, Flap Alternating Current
The Boeing Company

Mfr Part#
256W3541-1

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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