As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON INSPECTION, THE CYLINDER WAS FOUND TO HAVE A CRACK FROM THE SPARK PLUG BOSS TO THE FUEL NOZZLE. THE CRACK TRAVELS ALONG THE CASTING MARK ON THE CYLINDER. THE CYLINDER WAS STILL HOLDING 78/80. SUBMITTER BELIEVES THAT THIS IS A MANUFACTURING PROBLEM.