What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: SEVERE NOSE WHEEL VIBRATION AT 144 KNOTS AT ROTATION; SIGNIFICANT VIBRATION CONTINUED AFTER ROTATION MOMENTARILY. AIRCRAFT AIR INTERRUPTED BACK TO AND LANDED SAFELY AT CLT. REMOVED AND REPLACED BOTH NUMBER 1 (AALA202603201641) AND NUMBER 2 (AALA202603205702) NLG TIRES. PER AMM 32-45-21. LUBRICATED NLG UPPER (AALA202603205825) AND LOWER (AALA202603205534), PER AMM 12-21-21. ALL WORK DONE PER FIM 32-51-00-810-804.