EE WAS CLOSING THE CABLE REEL COMPARTMENT COVER. THE COVER WAS STIFF AND AS HE PULLED ON IT THE COVER BROKE LOOSE AND CLOSED, CATCHING HIS LEFT THUMB BETWEEN THE CABLE REEL COMPARTMENT AND THE COVER. THE INCIDENT CAUSED A LACERATION TO THE LEFT THUMB REQUIRING SUTURES. HE DID NOT MISS ANY TIME AND IS WORKING WITH SUTURES.