As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PUSHROD TUBE ON NR 2 CYLINDER INTAKE HAS A PERSISTENT OIL LEAK NEAR THE CRANKCASE. WHEN CHANGING THE PUSHROD TUBE SEAL THIS TIME, THE PUSHROD TUBE RETAINER WHICH IS PRESSED INTO THE CRANKCASE WAS FOUND CRACKED ABOUT ONE-FOURTH OF THE WAY AROUND THE CIRCUMFERENCE.