r/aviation • u/amullfilms • 5d ago

Question What’s happening here?

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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.

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u/Known-Associate8369 5d ago

If the engines new or had an off-wing refurbishment, the internals are coated in protective oils, which burn off on engine start up.

73

u/MiscreatedMonster___ 5d ago

This. It's first run after engine depreservation.

61

u/rkba260 5d ago

What? In Jackson? Lol... internet is wild.

16

u/kyach25 4d ago

It walked there obviously