Auxiliary Power Units (APUs) are self-contained gas-turbine assemblies that provide pneumatic bleed air and electrical power to an aircraft independently of the main propulsion engines, covering complete unit design, integration, and overhaul across turbomachinery, combustion systems, gearboxes, and associated control electronics including FADEC-governed power management.
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Auxiliary Power Units suppliers linked to most aircraft programs in our database.
Honeywell Aerospace, Engines & Systems (58 aircraft)
Sectors serving Auxiliary Power companies:
Engine Controls & Monitoring •
Engine Structure & Casings •
Engine Rotating & Gas-Path Parts •
Power Transmission •
Fluid Power •
Seals & Sealing •
Engine Accessories & Oil •
Actuation •
Valves •
Sensors, Transducers & Detectors •
Bearings •
Structural Components •
Mechanical Hardware •
Fuel Systems •
Electrical Power Systems •
Metals •
Pumps •
Fittings & Couplings •
Switches •
Tubing, Hoses & Conduits •
Environmental Systems •
Active Electronic Components •
Fasteners •
Terminals, Relays & Switching •
Composite Materials •
Lubricants •
Electrical/Electronic Connectors •
Passive Electronic Components •
Technical Consultants •
Non-metal Materials •
Mechanical Connectors •
Turbine Engines •
Adhesives
Auxiliary Power
Sectors purchasing from Auxiliary Power companies:
Airframer •
Electrical Power Systems •
Environmental Systems •
Airframe Assemblies •
Fluid Power •
Turbine Engines •
Aircraft Operations
