As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
A ROUTINE COMPRESSION CHECK INDICATES LEAKAGE ON THE NR 2 CYLINDER. FURTHER INVESTIGATION REVEALS A CRACK ON THE CYLINDER HEAD THAT EXTENDS FROM THE FUEL INJECTOR HOLE TO THE SPARK PLUG HOLE. SUBMITTER SUGGESTED POSSIBLE CAUSE AS DEFECTIVE CYLINDER HEAD INSTALLED ON THE CYLINDER AT REMANUFACTURE OF THE ENGINE.