As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAKE-OFF ROLL WE EXPERINCED A VIOLENT NOSE WHEEL SHIMMY BELOW 70 KNTS INDICATED. FOUND BOTH (LT & RT) NOSE TIRES OUT OF ROUND AND FLAT SPOTTED. BOTH NOSE WHEELS ALSO UNDER TORQUE SPECS. REMOVED LT & RT NOSE WHEEL ASSY. INSTALLED NEW L/H & R/H NOSE WHEEL ASSY.