As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THIS IS THE LATEST OF SEVERAL CYLINDERS PN SA52006A-1 WE HAVE HAD DEVELOP CRACKS BETWEEN HEAD AND BARREL ON EXHAUST SIDE. THE COMPRESSION WAS NORMAL AT 75/80 PSI, BUT WHEN A SOAP SOLUTION WAS APPLIED BETWEEN THE FINS A CRACK WAS FOUND.