As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) THE MUFFLER WAS REMOVED SERVICEABLE FROM AN ACFT WHICH WAS DOWN FOR EXTENDED MAINTENANCE, TT THIS INSTALL 1539.9 HOURS) AND INSTALLED ON THE SAME MODEL ACFT TO CLEAR A SNAG. THE MUFFLER TAILPIPE WAS FOUND LOOSE DURING A PREFLIGHT INSPECTION ONLY 27.5 HRS AFTER INSTALLATION. 1 END OF THE MUFFLER HAD BLOWN OUT COMPLETELY.