What was found
(CAN) PILOT REPORTED ROUGH RUNNING ENGINE AT HIGH RPM. RUN-UP FOUND NR 4 CYLINDER WAS COLD. THE ROCKER COVER WAS REMOVED AND THE ROCKER SHAFT, ROCKERS AND BOSSES BROKEN. ALL FOUR CYLINDERS WERE REPLACED.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
(CAN) PILOT REPORTED ROUGH RUNNING ENGINE AT HIGH RPM. RUN-UP FOUND NR 4 CYLINDER WAS COLD. THE ROCKER COVER WAS REMOVED AND THE ROCKER SHAFT, ROCKERS AND BOSSES BROKEN. ALL FOUR CYLINDERS WERE REPLACED.