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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Unit Ay
Unit Ay

Mfr Part#
251T2210-4

Feel Unit Installation
Feel Unit Installation

Mfr Part#
251T2200-5005

Feel Unit Installation
Feel Unit Installation

Mfr Part#
251T2200-6#B

Spring
Spring

Mfr Part#
25497

United Airlines
United Airlines

Mfr Part#
250N7104-135

United Airlines
United Airlines

Mfr Part#
250N7101-1680

US Air
US Air

Mfr Part#
250N7104-147

United States A/F
United States A/F

Mfr Part#
250N7104-1660

United Airlines
United Airlines

Mfr Part#
250N7104-1350

United Airlines
United Airlines

Mfr Part#
250N7104-1680

Buffer-A380 Phaseout
Buffer-A380 Phaseout
The Boeing Company

Mfr Part#
2516632

Support Lug-Aileron Power Control
Support Lug-Aileron Power Control

Mfr Part#
251A9112-4

Support Lug-Aileron Power Control
Support Lug-Aileron Power Control

Mfr Part#
251A9112-3

Support Lug-Aileron Power Control
Support Lug-Aileron Power Control

Mfr Part#
251A9113-8

Unit Ay
Unit Ay

Mfr Part#
251N2242-4

Unit Ay
Unit Ay

Mfr Part#
251N2242-3

Auxiliary Power Unit Dripshield Bracket
Auxiliary Power Unit Dripshield Bracket
The Boeing Company

Mfr Part#
148T8691U21

Retainer - Auxiliary Power Unit Auxiliary Door, Forward/Inboard, Left Hand
Retainer - Auxiliary Power Unit Auxiliary Door, Forward/Inboard, Left Hand

Mfr Part#
148T6566-37

Retainer - Auxiliary Power Unit Auxiliary Door, Forward/Outboard, Left Hand
Retainer - Auxiliary Power Unit Auxiliary Door, Forward/Outboard, Left Hand

Mfr Part#
148T6566-45

Retainer - Auxiliary Power Unit Auxiliary Door, Forward/Outboard, Left Hand
Retainer - Auxiliary Power Unit Auxiliary Door, Forward/Outboard, Left Hand

Mfr Part#
148T6566-29

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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