As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING PRE-FLIGHT, THE PILOT NOTICED A PIECE OF METAL HANGING FROM THE NR 2 EXHAUST SILENCER. THE NR 2 SILENCER WAS REMOVED AND NO DEFECTS WERE FOUND. THE NR 1 EXHAUST SILENCER WAS REMOVED AND INSPECTION FOUND A LARGE PIECE OF THE INTERNAL BAFFLE HAD BROKEN AWAY. THE NR 1 EXHAUST SILENCER WAS REPLACED.