As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DAY-PHL - FLT 648 - AFTER TAKEOFF AND GEAR RETRACTION THERE WAS EXCESSIVE VIBRATION FROM THE NOSE GEAR AREA. THE LANDING GEAR WAS CYCLED BUT DID NOT HELP. THE AIRCRAFT RETURNED TO THE FIELD AND LANDED WITHOUT INCIDENT. MAINTENANCE SECURED THE RIGHT NOSE LANDING GEAR DOOR CLOSED. (M)