As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
OUTER COMBUSTION CAN CRACKED 180 DEGREES AROUND FUEL NOZZLE WELD. PRIOR TO CRACK THE ENGINE WAS RATED AS A +22 MGT. THE ENGINE WAS -6 MGT WHEN CRACK WAS DISCOVERED. THE CRACK IS NOT VISIBLE TO THE PILOT DURING PREFLIGHT. AN INSPECTION MIRROR IS REQUIRED TO SEE THE CRACK. A CATASTROPHIC ENGINE FAILURE WITH A RESULTING FIRE WOULD HAVE OCCURED IF THE CRACK HAD NOT BEEN DETECTED.