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 Controller
Auxiliary Power Unit Controller

Mfr Part#
2117342-8

Outlet Unit, ISPS, Alternating Current
Outlet Unit, ISPS, Alternating Current
Thales Avionics Inc

Mfr Part#
183117-001

Tank Unit Assembly
Tank Unit Assembly
Simmonds Precision Products Inc

Mfr Part#
20128-0128

Auxiliary Power Unit-Aft Mount Support Block Assembly
Auxiliary Power Unit-Aft Mount Support Block Assembly
The Boeing Company

Mfr Part#
351U8250-1

Module Assembly - Medical Outlet Power
Module Assembly - Medical Outlet Power
BAE Systems Controls Inc

Mfr Part#
233W4213-10

Duct-Discharge, Auxiliary Power Unit
Duct-Discharge, Auxiliary Power Unit
Honeywell International Inc

Mfr Part#
70721302-1

Lock-Rudder Power Control Unit
Lock-Rudder Power Control Unit
The Boeing Company

Mfr Part#
J27028-31

Support-Auxiliary Power Unit
Support-Auxiliary Power Unit
The Boeing Company

Mfr Part#
352W1011-1

Seat Module Aft PSU Cover Support Bracket
Seat Module Aft PSU Cover Support Bracket
The Boeing Company

Mfr Part#
449W1310-649B

Auxiliary Power Unit Assembly
Auxiliary Power Unit Assembly

Mfr Part#
65-50901-85

Panel Assembly, Power
Panel Assembly, Power
GE Aviation Systems Ltd

Mfr Part#
PDP422-1

Auxiliary Power Unit-ACS-DR SAF-Spring-SUPT-Plate
Auxiliary Power Unit-ACS-DR SAF-Spring-SUPT-Plate
The Boeing Company

Mfr Part#
486Z4508-1

Lower-Splice-Seal-Flap-Auxiliary-A
Lower-Splice-Seal-Flap-Auxiliary-A
The Boeing Company

Mfr Part#
153Z4601-11

Top Kit, Retrofit-ISS 369.00 FLE Auxiliary T
Top Kit, Retrofit-ISS 369.00 FLE Auxiliary T
The Boeing Company

Mfr Part#
005W0065-28

Top Kit, Retrofit-ISS 369.00 Degrees FLE Auxiliary T
Top Kit, Retrofit-ISS 369.00 Degrees FLE Auxiliary T
The Boeing Company

Mfr Part#
005W0065-21

Auxiliary Power Unit Controller
Auxiliary Power Unit Controller

Mfr Part#
2119590-101

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

Mfr Part#
148A6350-78

Auxiliary Power Unit
Auxiliary Power Unit
United Technologies Corporation

Mfr Part#
170101-106

Unit Assembly
Unit Assembly
Rosemount Aerospace Inc

Mfr Part#
8730B1-1

Auxiliary Power Unit Drain Tube
Auxiliary Power Unit Drain Tube
The Boeing Company

Mfr Part#
356T0101-12

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.

DISCLAIMER: Product information provided “as is.” Boeing may add, change, discontinue or remove this information at any time. Product photos may not be exact match to product delivered. See terms & conditions.