As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT DEPARTED FOR FLIGHT AND NOTICED A VIBRATION COMING THROUGH THE AIRCRAFT. THE PILOT RETARDED THE RT ENGINE POWER LEVER AND VIBRATION WENT AWAY. PILOT THEN TURNED THE AIRCRAFT BACK WHERE THE AIRCRAFT LANDED AND MAINTENANCE PERSONNEL TROUBLESHOT THE PROBLEM. THE RT STARTER GENERATOR WAS SUBSEQUENTLY REMOVED AND AN OVERHAULED GENERATOR WAS INSTALLED.