As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAKE OFF AT 40 KTS A SEVERE SHIMMY VIBRATION AT THE NOSE WHEEL THRU 55 KTS. IT WAS SO SEVERE THAT IT KICKED THE YD LOWER. TAKEOFF GROSS WEIGHT 30,773. FUEL 8400. REMOVED AND REPLACED NOSE LANDING GEAR UPPER AND LOWER SISSOR TORQURED LINKS ASSYING OPERATIONALY CHECKS' GOOD. REMOVED AND REPLACED NOSE LANDING GEAR WHEELS IAW MM 32-20-00 32-41-01.