Especially this ace pilot.
I’m pretty committed to the wreckage/debris field off Pulau Palax, but this engineer changes everything. I think the pilot would have done everything to recover control, unless someone incapacitated him.
I think it all points to a very well planned event. As to whether the pilot was involved himself - or someone else took over forcibly from him - I just don’t know. But if it was a takeover, it would have to be someone just as expert as the pilot - in continuing to fly this plane and get it up to some northern country without being detected.