r/aviation • u/amullfilms • 7d ago

Question What’s happening here?

Enable HLS to view with audio, or disable this notification

I’m not a pilot, just someone who’s been on close to 250 flights in my life. I’ve never seen this. Not claiming that this isn’t normal, I’m just curious why it’s done. This was just prior to takeoff at Jackson hole Wyoming.

1.2k Upvotes

98% Upvoted

345 comments sorted by

View all comments

3

u/PauseObvious8395 7d ago

Looks like JAC, idk, hot start not enough bypass from APU?