As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE CONTINENTAL CYLINDER CRACKED WITH ONLY 1,216.4 HOURS ON IT. THE CRACK ORIGINATED AT THE SPARK PLUG BOSS AND WAS TRAVELLING TO THE FUEL INJECTION NOZZLE. THE COMPRESSION WAS STILL IN THE UPPER 60'S. SUBMITTER STATED THEY HAVE BEEN EXPERIENCING ALOT OF THIS TYPE OF CRACKING AND BELIEVE IT TO BE A PROBLEM WITH THE MANUFACTURING PROCESS AT CONTINENTAL OR THEIR SUB-CONTRACTORS.