As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF, THE CREW SELECTED GEAR UP BUT GO A RED GEAR UNSAFE LIGHT. THE CREW CONSULTED WIGH MECHANIC AND CYCLED THE GEAR BUT STILL HAD AN RED IN TRANSIT LIGHT. THE CREW DID AIR TURN BACK AND MADE AN UNEVENTFUL LANDING. MECHANIC INSPECTED THE SYSTEM AND REPLACED THE POWER LEVER LANDING GEAR WARNING HORN CONTROL. THE A/C DID A TEST FLIGHT WITH NO FURTHER DEFECTS.