While it's not uncommon for bits of crashed machinery to wash up on shore, I can't say I've ever heard of something traveling this far:

A tail section from a U.S. Navy fighter jet that crashed 3 1/2 years ago off Key West, Fla., has turned up 4,900 miles away on a beach in Ireland.

Fortunately the crew in the F-14 which once owned the tail section got out just fine.