As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT RETURNED TO PLATFORM AS A CONSEQUENCE OF AIRCRAFT EXPERIENCED STRONG VIBRATION DURING TAKEOFF. NOSE LANDING GEAR WAS CHECKED BEING ALL CORRECT IAW MM 32-21-01. AIRCRAFT NOSE LANDING GEAR WAS JACKED DETECTING UNBALANCED BETWEEN BOTH WHEELS. REPLACED IAW MM 32-42-00, ALL CORRECT.