As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 4435 DURING CLIMBOUT, THE CREW REPORTED THE GEAR HANDLE WOULD NOT RELEASE, TO GET GEAR TO RETRACT. THE CREW ELECTED TO RETURN TO RDU. THE AIRCRAFT LANDED WITHOUT INCIDENT. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED AIR GROUND RELAY IAW AMM 20-13-02. PERFORMED AN OPERATIONAL CHECK OF THE EXTENSION AND RETRACTION THROUGH SIX CYCLES. THE OPERATIONAL CHECK WAS GOOD. THE AIRCRAFT WAS RETURNED TO SERVICE.