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

Mfr Part#
148T6566-39

Skin-Auxiliary Power Unit Access Door, Aluminum
Skin-Auxiliary Power Unit Access Door, Aluminum
The Boeing Company

Mfr Part#
148W5663-6

Drain Fitting - Auxiliary Power Unit Door, Rework
Drain Fitting - Auxiliary Power Unit Door, Rework

Mfr Part#
148W5692-73

SUPT Assembly
SUPT Assembly

Mfr Part#
149A7270-901

Clamp-Hose, Auxiliary Power Unit
Clamp-Hose, Auxiliary Power Unit

Mfr Part#
20080S

Module Assembly Auxiliary Power Unit Acc
Module Assembly Auxiliary Power Unit Acc

Mfr Part#
204-60604-1

Duct Assembly - Auxiliary Power Unit Pneumatic, Section 44
Duct Assembly - Auxiliary Power Unit Pneumatic, Section 44
The Boeing Company

Mfr Part#
212U3125-1

Bracket-Auxiliary Power Unit Duct Support, Section 48
Bracket-Auxiliary Power Unit Duct Support, Section 48

Mfr Part#
212T3706-7

Duct-Auxiliary Power Unit, Air Supply System
Duct-Auxiliary Power Unit, Air Supply System
The Boeing Company

Mfr Part#
212T3139-15

Duct-Auxiliary Power Unit Pneumatic, Section 44
Duct-Auxiliary Power Unit Pneumatic, Section 44

Mfr Part#
212U3124-2

Bracket-Auxiliary Power Unit Air Supply Duct, Frame Station
Bracket-Auxiliary Power Unit Air Supply Duct, Frame Station

Mfr Part#
212A9812-3

Duct Assembly-Auxiliary Power Unit, Air Supply System
Duct Assembly-Auxiliary Power Unit, Air Supply System
The Boeing Company

Mfr Part#
212T3139-16

Shield Detail - Auxiliary Power Unit Air Supply, Section
Shield Detail - Auxiliary Power Unit Air Supply, Section
The Boeing Company

Mfr Part#
212W1452-1

Welded Duct Assembly - Auxiliary Power Unit Air Supply, Sect
Welded Duct Assembly - Auxiliary Power Unit Air Supply, Sect

Mfr Part#
212W1154-8

Welded Duct Assembly - Auxiliary Power Unit Air Supply, Sect
Welded Duct Assembly - Auxiliary Power Unit Air Supply, Sect
The Boeing Company

Mfr Part#
212W1152-5

Welded Duct Assembly - Auxiliary Power Unit Air Supply Section 4
Welded Duct Assembly - Auxiliary Power Unit Air Supply Section 4

Mfr Part#
212W1155-6

Duct System - Auxiliary Power Unit Air Supply, Section 46/47
Duct System - Auxiliary Power Unit Air Supply, Section 46/47
The Boeing Company

Mfr Part#
212W1212-8

Duct System-Auxiliary Power Unit Air Supply, SEC 46/47, 77
Duct System-Auxiliary Power Unit Air Supply, SEC 46/47, 77
The Boeing Company

Mfr Part#
212W1212-9

Welded Duct Assembly, Auxiliary Power Unit Air Supply, Section
Welded Duct Assembly, Auxiliary Power Unit Air Supply, Section

Mfr Part#
212A2621-76

Bracket Assembly - Auxiliary Power Unit Air Supply Duct, Forward
Bracket Assembly - Auxiliary Power Unit Air Supply Duct, Forward

Mfr Part#
212A2421-1

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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