As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT LANDING IN VIEQUES AIRPORT RIGHT ENGINE PRESENTED EXESIVE VIBRATION, PILOT PERFORMED PREVENTIVE SHUTDOWN. ENGINE WAS INSPECTED AND FOUND THE PROPELLER GOVERNOR SHAFT BROKEN. PROPELLER GOVERNOR WAS REMOVED AND OVERHAULED PROPELLER GOVERNOR INSTALLED. OPERATIONAL CHECK PERFORMED FOUND NO OTHER DISCREPANCIES.