What was found
PDX - NWS ABRUPTLY PULLED AIRCRAFT TO THE RIGHT JUST AFTER TOUCHDOWN AT APPROX 80-90 KNOTS NOSE STEERING FAILED CAUTION LIGHT THEN ILLUMINATED WITH NO NWS AVAILABLE. REGAINED STEERING WHEN OFF THE RUNWAY BY CYCLING NWS SWITCH. ALL HYD NORMAL. COMPLIED WITH FIM TASK 32-51-06-810-801, FOUND FAULT. (PHC) REMOVED AND REPLACED NOSE WHEEL STEERING HAND CONTROL AS PRECAUTIONARY IAW DHC-Q400 AMM32-51-06-000-801/32-51-06-400-801. PERFORMED NWS FUNCTIONAL IAW 32-51-00-720-801, NO DEFECTS NOTED. OPS CHECK GOOD. RETURNED TO SERVICE.