As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PIT-ROC - FLT 218 - AFTER TAKEOFF AND LANDING GEAR RETRACTION THE NOSE GEAR UNSAFE LIGHT REMAINED ON. THE LANDING GEAR WAS EXTENDED AND ALL THREE GREEN LIGHTS ILLUMINATED. THE AIRCRAFT RETURNED TO THE FIELD AND LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED A CORRODED ELECTRICAL CONNECTOR AT THE NOSE GEAR UPLOCK SWITCH. (M)