Using iPhone 12 with iOS 15. something
Really annoying I find the APU startup sound on relevant aircraft does not always last. Some planes with it I change the views during APU start (at gate and starting a flight) and after landing when starting APU you’ll hear the initial start then silence when you shut down engines at gate and APU is running.
Is this a glitch??
Tried so many ways for it to be consistent, and ruins the experience when its quiet after APU start.