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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Inlet Hinge Fairing - Auxiliary Power Unit
Inlet Hinge Fairing - Auxiliary Power Unit
The Boeing Company

Mfr Part#
353W4101-3

Shell Assembly-Auxiliary Power Unit Inlet Door
Shell Assembly-Auxiliary Power Unit Inlet Door
The Boeing Company

Mfr Part#
353W3301-1

Intake Assembly - Auxiliary Power Unit
Intake Assembly - Auxiliary Power Unit

Mfr Part#
353W2100-4

Intake Assembly - Auxiliary Power Unit
Intake Assembly - Auxiliary Power Unit

Mfr Part#
353W2100-3

Intake Assembly - Auxiliary Power System
Intake Assembly - Auxiliary Power System
The Boeing Company

Mfr Part#
353W2100-27

Intake Duct Assembly - Auxiliary Power Unit
Intake Duct Assembly - Auxiliary Power Unit
The Boeing Company

Mfr Part#
353W4100-5

Intake Assembly - Auxiliary Power System
Intake Assembly - Auxiliary Power System
The Boeing Company

Mfr Part#
353W2100-31

Auxiliary Power Unit Duct Assembly-Rework
Auxiliary Power Unit Duct Assembly-Rework
The Boeing Company

Mfr Part#
353W2100-12

Duct Assembly-Air Inlet, Auxiliary Power Unit, 747-400
Duct Assembly-Air Inlet, Auxiliary Power Unit, 747-400
The Boeing Company

Mfr Part#
353U0106-32

Intake Duct Assembly - Auxiliary Power Unit
Intake Duct Assembly - Auxiliary Power Unit
The Boeing Company

Mfr Part#
353W4100-6

Intake Assembly - Auxiliary Power System
Intake Assembly - Auxiliary Power System
The Boeing Company

Mfr Part#
353W2100-36

Intake Assembly - Auxiliary Power Unit
Intake Assembly - Auxiliary Power Unit

Mfr Part#
353W2100-9

Intake Assembly - Auxiliary Power Unit
Intake Assembly - Auxiliary Power Unit
The Boeing Company

Mfr Part#
353W2100-11

Intake Assembly - Auxiliary Power Unit
Intake Assembly - Auxiliary Power Unit
The Boeing Company

Mfr Part#
353W2100-13

Intake Assembly - Auxiliary Power Unit
Intake Assembly - Auxiliary Power Unit

Mfr Part#
353W2100-17

Auxiliary Power Unit Duct Assembly
Auxiliary Power Unit Duct Assembly
The Boeing Company

Mfr Part#
353W2100-25

Intake Assembly - Auxiliary Power System
Intake Assembly - Auxiliary Power System
The Boeing Company

Mfr Part#
353W2100-33

Canister, Intake Actuator - Auxiliary Power System
Canister, Intake Actuator - Auxiliary Power System

Mfr Part#
353W2206-1

Intake System-Auxiliary Power Unit
Intake System-Auxiliary Power Unit

Mfr Part#
353W2100-1

Leg Assembly, Auxiliary Power Unit Intake, 17-7PH CRES
Leg Assembly, Auxiliary Power Unit Intake, 17-7PH CRES

Mfr Part#
353W2101-16

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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