As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE PILOT REPORTED THAT ON TAKEOFF FROM RUNWAY 12, THE RT MLG DID NOT RETRACT. THE RED IN-TRANSIT LIGHT AND THE RIGHT MAIN GEAR DOWN AND LOCKED LIGHT BOTH REMAINED ILLUMINATED. THE PILOT SELECTED GEAR DOWN AND THE THREE GREEN DOWN AND LOCKED LIGHTS ILLUMINATED. THE PILOT RETURNED AND LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED THE RIGHT MAIN LANDING GEAR AND FOUND THE GEAR ACTUATOR SHAFT HAD BROKEN. REMOVED AND REPLACED THE GEAR ACTUATOR.