As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAKEOFF ROLL, A NOSE GEAR THUMP WAS REPORTED AT 80 KNOTS, ACTED LIKE ONE TIRE MIGHT BE GOING FLAT. EMERGENCY DECLARED AND AIRCRAFT LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE INSPECTED THE NOSE GEAR TIRES AND FOUND TO BE OUT OF ROUND. MAINTENANCE ALSO REPLACED BOTH TIRES IAW AMM 32-45-21, AND PERFORMED A SATISFACTORY OPERATIONAL CHECK.