As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PIT-SBN - FLT 753 - DURING CLIMB, THE LANDING GEAR DOOR OPEN LIGHT ILLUMINATED. TURNING ON THE HYDRAULIC PUMPS AND REDUCING AIRSPEED DID NOT HELP. THE LIGHT EXTINGUISHED DURING DESCENT. THE AIRCRAFT RETURNED TO THE FIELD AND LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED THE RIGHT GEAR DOOR PROXIMITY SENSOR ELECTRICAL RECEPTACLE. (M)