As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) REPORTS OF IN-FLIGHT VIBRATION LED THROUGH ONGOING TROUBLESHOOTING TO THE DISCOVERY OF SEVERAL LOOSE ROD ENDS TO PISTON JAM NUTS. JAM NUTS TORQUED AND VIBRATION DISAPPEARED. OPERATOR IS INVESTIGATING WITH OWNER REGARDING PREVIOUS MAINTENANCE PERFORMED IN AREA.