Powerplant
Two Pratt & Whitney Canada, PW545B turbofan engines are installed in the XLS, one on each side of the rear fuselage, in easily accessible nacelles.
The PW545A produces a static takeoff thrust of 3,991 pounds at sea level, up to 82 °F. Featuring a new, high efficiency exhaust nozzle, the PW545B has a bypass ratio of 3.8 to 1. The PW545A uses a single channel EEC (electronic engine control) to reduce pilot workload with a hydromechanical fuel control as manual back-up.
A continuous loop fire detection system monitors the nacelle area to detect and warn if a fire occurs. A two-shot fire extinguishing system is supplied. Target-type, hydraulically actuated thrust reversers are standard.
The Honeywell RE100(XL) APU is installed in the tail-cone equipment bay. The APU supplies bleed air for pressurization and air conditioning, electrical power for engine assisted air starts, and other benefits. It is certified for use in flight up to 30,000 feet.