As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING A SCHEDULED VISUAL INSPECTION OF THE ENGINE, EVIDENCE OF OIL SEEPING FROM THE CYLINDER ROCKER BOX COVER AREA WAS DISCOVERED ON TWO CYLINDERS. USING SOAP BUBBLES AND AIR, OIL SEEP WAS ISOLATED TO SEVERAL SMALL PIN HOLES AROUND THE RAISED STAMPED AREA ON THE ROCKER BOX COVER WHERE "LYCOMING" IS STAMPED. FURTHER INSPECTION WITH A 10X MAGNIFYING GLASS CONFIRMED THE STAMPED AREA TO HAVE SMALL HOLES/CRACKS DIRECTLY AROUND THE EDGES OF THE STAMPED LETTERING.