As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 2021 - MHR - UPON GEAR RETRACTION, 3 GEAR UNSAFE LIGHTS ILLUMINATED. TAIL SKID AMBER LIGHT ILLUMINATED. AIRCRAFT MADE AN UNEVENTFUL RETURN LANDING AT MHR. PINNED GEAR, CYCLED HANDLE TO FULL UP POSITION. RED INTRANSIT LIGHT ILLUMINATED AND UNSAFE HORNS SOUNDED AS DESIGNED. CYCLED GEAR HANDLE DOWN. THREE GREEN HORN SILENCED. RE-RACKED LANDING GEAR ACCESSORY BOX. OPERATIONALLY CHECK GOOD ON GROUND. AIRCRAFT WAS RETURNED TO SERVICE. (M)