As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW - FLT 3842 - CREW REPORTED WHEN PASSING OVER THE OUTER MARKER, GEAR WAS SELECTED DOWN BUT REMAINED UP AND LOCKED. LANDING GEAR WAS MANUALLY EXTENDED AND LANDED WITH NO FURTHER INCIDENTS. MAINTENANCE REMOVED AND REPLACED THE LANDING GEAR CONTROL VALVE IAW CRJ MM. OPS CHECK WAS GOOD AND AIRCRAFT WAS RETURNED TO SERVICE. (M)