What was found
AFTER LANDING GEAR EXTENSION ON APPROACH INTO DEN, STEER FAIL EICAS CAUTION MESSAGE APPEARED. CYCLED GEAR, MESSAGE WENT AWAY. EXTENDED GEAR AGAIN, MESSAGE REAPPEARED. DECLARED AN EMERGENCY, LANDED WITHOUT INCIDENT. MAINTENANCE RESET C/B B25. ENGINEERING ISSUED AN SI TO REMOVE AND REPLACE THE NOSE WHEEL STEERING CONTROL MODULE. THE SI WAS COMPLIED WITH 4/14/09.