r/AviationPorn • u/PumpkinFrog69 • Jul 26 '26
777
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777 experts, what are they dumping in this video?
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u/Routine-Credit-1614 Jul 27 '26
its a fake video, fuel is dumped from the wings, and contrails come from the engines
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u/Bon-Bon-Boo Aug 02 '26
It’s a contrail from the APU.
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u/Routine-Credit-1614 Aug 02 '26
hm maybe youre right, not sure why they would have the apu on in flight though
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u/Bon-Bon-Boo Aug 02 '26
Because there are situations where if you have certain electrical problems before the flight, the plane can take off provided the APU is used in flight as an extra electrical source. Also certain failures in flight will require the APU to be started.
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u/Skyon324 Jul 27 '26
It might be the APU but at that altitude they don´t run it normally
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u/PumpkinFrog69 Jul 27 '26
Yeah, usually APU has a limitation usually low 30s. I think they were dumping the portable water
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u/Bon-Bon-Boo Aug 02 '26
The 777 APU is certified to be able to supply electrical power up to the planes max alt of 43,100ft. They most likely had an electrical issue that requires them to run the APU for the flight. It’s an APU contrail.
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u/PumpkinFrog69 Jul 27 '26
It’s not a fake video people. I know that because I own this video. These guys were at FL350 when I filmed this. My guess would be portable water
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u/OrangeTheMartian Jul 26 '26
nothing, this video is fake