As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE PERFORMING VISUAL INSPECTION DURING ANNUAL INSPECTION, TECH NOTED STAINING BETWEEN CYLINDER FINS ON INTAKE SIDE OF CYLINDER NR 6 ON RT ENGINE. CYLINDER COMPRESSION CHECK AND BORESCOPE INSPECTION CONFIRMED THAT STAINING WAS DUE TO A CRACK BETWEEN INTAKE VALVE AND SPARK PLUG BOSS. CYLINDER SN IS OUTSIDE OF RANGES IN BOTH AD 2004-08-10 AND SAIB NE-07-09. CYLINDER WAS INSTALLED NEW ON 12-29-2009.