Bleed Air System

The bleed air system supplies high temperature, high pressure air from the engines to the boundary layer control system (on aircraft without slats), the cabin air conditioning system, and the fuel cell pressurization system. Control of the bleed air flow, temperature and pressure is initiated and regulated by the requirements of each system. The system utilizes engine compressor bleed air tapped off the 17th stage compressor. Normally, both engines supply the air for the operation of these systems, but when necessary, single engine operation will supply sufficient air for their operation.