As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) VIBRATION ON RT ENGINE, ACFT RETURNED TO BASE. TROUBLESHOT AND FOUND THE SPINNER TO HAVE ICE ACCUMULATED ON THE INTERIOR. ICE WAS REMOVED, SPINNER WAS CLEANED AND ENGINE/PROPELLER OPERATIONAL. GROUND CHECKS WERE CARRIED OUT WITH NO FURTHER VIBRATIONS NOTED.