hello,
on the subjects on APU operation,
what is the exhaust sound heard from the APU when the aircraft is about to commence push?
i know that the a/c would be out of power if the APU was to be shut down at this time as ex pwr has already been disconnected plus none of the EDG's have not come online yet (the a/c hasnt started its engines)
hope you guys can help,
G-STAW