Maybe waiting for the pane to go down while it’s out of range of any possible radar? It seems to be in the middle of the ocean and maybe that was where he planned to more or less run out of fuel 🤷‍♂️

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Maybe it could also have been the first officer if he prepared really well? There seems to be a lot of evidence confirming a well planned route with all communication disabled.

Anyway, it clearly looks like it is a suicide that he tried to mask as an accident. It’s the worst way to go, taking all these casualties. It wouldn’t be the first one, but definitely the best covered up so far.