As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
KDAL-KORD - FLT 35 - DOOR WARNING AND UPLATCH WARNING LIGHTS ON AFTER GEAR RETRACTION. RECYCLED GEAR AND WARNING LIGHTS EXTINGUISHED. MAINTENANCE REMOVED AND REPLACED THE MLG CONTROL VALVE. OPERATIONAL CHECK OF THE MLG RETRACTION AND WARNING SYSTEM WAS GOOD.