The Pratt & Whitney APS5000 APU is the industry's first all-electric APU for large commercial aircraft. This single-shaft, variable-speed gas turbine APU develops 450kVA of electrical power at sea level that starts and operates up to 43,100 feet. The APS5000 APU was designed exclusively for the Boeing 787 Dreamliner. It is the quietest APU in its class with the lowest emissions in the industry and backed by maintenance plans that deliver flexibility and predictable costs while maximizing performance and time between maintenance.