As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER ENGINE FAILURE, MORE THAN HALF THE BOLTS SECURING THE ENGINE INLET HA D UNSCREWED THEMSELVES. THE REMAINING WERE LOOSE. SUBMITTER SUSPECTS UNUSUAL ENGINE VIBRATION CAUSED THE BOLTS TO BACK OUT. THE INLET COULD POSSIBLY FALL OFF THE AIRCRAFT IN-FLIGHT.