As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 6499 - IAD-ROA - DURING CLIMB-OUT HAD SEVERE PROPELLER VIBRATION. AIRCRAFT RETURNED TO IAD WITH NO FURTHER INCIDENTS. MAINTENANCE THEN REPLACED THE PROPELLER ON THE LEFT ENGINE. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (W)