As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER RUN-UP, OIL FILM NOTED ON LEFT SIDE OF ENGINE. OIL CAME FROM DENT IN PUSH ROD SHROUD TUBE WHICH WAS FOUND COMPLETELY FRACTURED AT DENT LOCATION. PUSH ROD HAD APPARENTLY RUBBED SHROUD AND CAUSED THE FRACTURE. DENT WAS ABOUT .0937 INCH DEEP. OTHER SHROUD TUBES HAD MINOR DENTS APPARENTLY LONG-STANDING. 1100 HRS SMOH/POTENTIAL FOR EXCITING MOMENTS IF NOT CORRECTED.