Wow, that's a lot of expensive trouble to go through to cover up. I wonder what the penalties would be otherwise - I'm sure there is some kind of code it broke but it's not obviously illegal. It's like me crashing my car on purpose.
It's very illegal. Part 91 § 91.13 careless or reckless operation [1] and § 91.15 dropping objects [2]. (I'm studying for my pilot's license.)
Also, until SCOTUS rules otherwise, agency rules carry the strength of statute.
Probably the latter unless someone gets hurt. (Agree with you that this was a dumb cover-up. Particularly when he seems to have done the cover up before posting the video?)
If he had dismantled the plane before the FAA knew about the crash, would that still qualify as destroying evidence?
Rape isn't funny. You might want to consider not using that slang term.