What was found
ACY - FLT 8055 - AIR RETURN, AFTER TAKEOFF DURING GEAR RETRACTION HAD 'EXTREME' VIBRATION, RECYCLED GEAR WITH NO RESOLVE. RERIGGED NLG DOOR RT SIDE AND INSTALLED SHIMS IN INBOARD BRACKET. NLG SWING IAW DC9 MM 32-22-01. OPS CHECK NORMAL. NO DEFECTS FOUND AT THIS TIME. (M)