As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW - FLT 2257 - DURING LANDING AFTER GEAR EXTENSION, LANIDNG GEAR DOWN LOCK WARNING. ACCOMPLISHED ALTERNATE PROCEDURE GEAR NORMAL INDICATION. LANDED ORD WITHOUT INCIDENT. REPLACED MAIN GEAR BACKUP SENSOR TARGET SCREW. SYSTEM GROUND CHECK NORMAL OPERATION. (M)