What was found
(CAN)ON TAKEOFF, AT FULL POWER, ABORTED DUE TO SEVERE ENGINE VIBRATION. #4 CYLINDER VALVE ROCKER SHAFT BOSSES BROKEN ACROSS BOTH VALVES.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
(CAN)ON TAKEOFF, AT FULL POWER, ABORTED DUE TO SEVERE ENGINE VIBRATION. #4 CYLINDER VALVE ROCKER SHAFT BOSSES BROKEN ACROSS BOTH VALVES.