However, he also mentioned an exception to this procedure: "In the Boeing 787 I fly, engines are started electrically without compressed air from the APU." The auxiliary power unit (APU ...

The main battery powers up the 787's electrical systems before the engines start and supports refueling. APU battery The auxiliary power unit battery starts a small turbine engine in the airplane ...

Pilots can leave the APU on after the first engine starts and use the pressurized ... Some planes do this automatically, ...

On engine technology, we examine why Boeing may be cooling on plans for an ... exhaustive directories of all the world’s engine and APU overhaul and repair providers.