As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS SQUAWKED FOR OIL LEAKING FROM COWL. UPON INSPECTION THE LEAK WAS DETERMINED TO BE COMMING FROM A CRACK ON TOP OF ENGINE UNDER COOLING SHROUD. (COOLING SHROUD HAS TO BE REMOVED TO INSPECT THIS AREA) THE CRACK WAS APPROXIMATLY 3 INCHES AND IS ORINTATED FORE AND AFT BETWEEN CYLINDERS 1 AND 3.