[Durt]

I've seen baggage handlers deliberately drop guitar cases on the tarmac at the airpost and fork lift drivers "accidentally" crush part of my drumset cases when I was a musician.
I have no idea if your engine was crated or just strapped to a pallette - but sometimes nice things "accidentally" get destroyed by envy & some guy who just flat-out hates his gig. But I'm speculating.
This is a shame.