As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) ON ROLL OUT AND TAXI A HIGH PITCHED WHINE, THAT CHANGED WITH ENGINE SPEED, WAS HEARD. ON SHUTDOWN THE ENGINE STARTED TO VIBRATE. INSPECTION OF THE ENGINE REVEALED SMALL AMOUNTS OF MELTED FRAGMENTS IN THE EXHAUST CONE. THE ENGINE IS BEING REMOVED AND SENT FOR INVESTIGATION.