What was found
WHEN THE MAIN LANDING GEAR WAS EXTENDED FOR FINAL, ECAM WHEEL, NLG STEERING FAULT. WHEEL PAGE DISPLAYED NLG STEERING. AFTER LANDING UNABLE TO STEER ACFT TO EXIT RUNWAY. SELECTOR VALVE FOR NLG STEERING 5113GC, BSCU 3GG, CLASS 1 HARD FAULT. TROUBLESHOT IAW AMM TSM 32-50-00-810-809-A, NOT OK, BITE OF BSCU FAULTED SELECTOR VALVE CONTROL, IAW AMM 32-46-00-740-801. REMOVED THE SELECTOR VALVE IAW AMM 32-51-53-000-801. A FOUND A BROKEN PIN, PULLED AND COLLARD ASSOCIATED CIRCUIT BREAKERS U37-722VU, G62-742VU, AND HYDRAULIC SYSTEM DEPRESSURIZED. R & R THE HYDRAULIC BLOCK, NWS IAW AMM 32-51-21. OK FOR SERVICE.