As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW - FLT 3850 - DURING APPROACH CREW REPORTED THE LANDING GEAR WOULD NOT EXTEND. FOLLOWED QRH PROCEDURES AND GEAR EXTENDED. AIRCRAFT LANDED WITH NO FURTHER INCIDENT REPORTED. NOSE WHEEL STEERING SYSTEM WAS INOPERATIVE UPON LANDING. MAINTENANCE REMOVED AND REPLACED THE LANDING GEAR SELECTOR VALVE IAW CRJ MM. OPERATIONAL AND LEAK CHECK WAS SATISFACTORY AND AIRCRAFT WAS RETURNED TO SERVICE. (M)