As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEA-DURING ROTATION MODERATE TO SEVERE VIBRATION FELT FROM NOSE WHEEL AREA. VIBRATION WAS EVIDENT IN CABIN AND COCKPIT. AIRCRAFT RETURNED TO SEA, LANDED AIRCRAFT WITHOUT INCIDENT. FIRE AND RESCUE MET AIRCRAFT ON LANDING. REPLACED #1 AND #2 NOSE WHEEL ASSY. INSPECTED NOSE LANDING GEAR, NO DEFECTS NOTED. AIRCRAFT RETURNED TO SERVICE.