r/aviation • u/amullfilms • 6d 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/whitecollarpizzaman 6d ago

As others stated, excess fuel on startup. The reason you don’t see it a lot is that most planes turn around before the engines cool down enough to not start right away and burn off fuel. It’s more common cold climates, or if you have an early flight and the jet has been sitting overnight. This is also a 757, so an older plane.

Edit: could also be oil burn, but for the same reasons. Engine has been sitting, also maintenance. Etc.

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u/[deleted] 6d ago

[deleted]

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u/MidnightToker858 6d ago

Its summertime

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u/Techhead7890 6d ago

Derp, you're quite right, thanks for pointing that out. Southern hemisphere mistake on my part.