What was found
AFTER EXITING RNWY, ATTEMPTED NORMAL 90 DEGREE LT TURN, CREW HEARD THUMP & LOST LT TURN AUTHORITY. INITIAL EVALUATION REVEALED BOLT & PIN ATTACHING LT STEERING ACTUATOR TO STEERING COLLAR TO BE MISSING. TOP HALF OF SHEARED BOLT & PIN WAS RECOVERED ON THE TAXIWAY BY THE PORT AUTHORITY. IDENTIFIED PARTS INSPECTED NOSE STRUT STEERING CYLINDERS AREA. STARTED NOSE GEAR LT STEERING CYLINDER REMOVAL IAW AMM 32-52-30-4 UP TO STEP C 8 WITH THE EXCEPTION OF STEP C 7 NLG SWIVEL GLAND REMOVAL. SWIVEL GLAND WAS NOT REMOVED JUST DISCONNECTED & CAPPED. UPON FURTHER INSPECTION FOUND NOSE GEAR LT GLIDESLOPE ANTENNA MOUNTING BRACKET DAMAGED. REMOVED SAME FOR REPLACEMENT IAW AMM 32-52-30-4. REPLACED LT NOSE STEERING COLLA