As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INTAKE TO CYLINDER GASKET FAILED NEAR BOLT HOLE AFTER 10 HOURS FLIGHT. SURFACE PLATE TEST REVEALED NO ABNORMALITIES IN SEALING SURFACE. GASKET SHOWED DEFINITE IMPRESSION FROM INTAKE TUBE - SEATED 360 DEGREES. GASKET SUPPLIER SUGGESTS A SOFT SPOT ON THE GASKET WHICH FAILED.