As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PIT - CREW REPORTED NOSE LANDING GEAR FAILED TO RETRACT. EMERGENCY DECLARED FLIGHT RETURNED PIT LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. REPLACED NOSE LOCKED GEAR SENSOR D1-32 AND CONNECTOR P1-1157. SYSTEM GROUND CHECK NORMAL OPERATION.