As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
VIBRATION FELT FROM NOSE AFTER LIFTOFF. JACKED ACFT NOSE, ROTATED NOSE WHEEL ASSEMBLY & HEARD LOOSE COUNTER WEIGHT INSIDE OF TIRE. CONFIRMED AFTER DISASSEMBLY OF NOSE WHEEL THAT THE RUBBER WEIGHT HAD DISBONDED FROM INNER PORTION OF NOSE TIRE.