Engine bleed air systems include components that deliver and control compressed engine bleed air from the main engine or auxiliary power unit to other downstream systems.  These systems include cabin air conditioning, aircraft and hydraulic reservoir pressurization, engine start, and wing and engine cowl ice removal.

Technology that enhances the systems includes digital electronic control, which provides the ability to customize bleed air extraction and minimizes fuel burn.

Key benefits of the systems are highly reliable valves and weight and volume optimized compact precooler heat exchangers.