As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON APPROACH DURING LANDING GEAR EXTENSION A LOUD POPPING NOISE WAS HEARD FROM THE NLG AREA. NLG STEERING WORKED ON LANDING ROLLOUT THEN QUIT WHEN THE RUNWAY WAS CLEARED. STEERING FROZEN IN BOTH DIRECTIONS. FOUND THE RIGHT STEERING CYLINDER AFT MOUNT ATTACH LUG BROKEN REF IPC 32-52-02-2. REMOVED AND REPLACED RIGHT STEERING CYLINDER HYDRAULIC LINES TO CYLINDER AND I/B SWIVEL ASSY.