As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF THE CREW ATTEMPTED TO RETRACT THE LANDING GEAR AND NOTED THE RED GEAR UNSAFE LIGHT ILLUMINATED. THE CREW CYCLED THE LANDING GEAR AND HAD THE SAME INDICATIONS. THEY SELECTED GEAR DOWN AND RETURNED TO STARTING POINT. MX TROUBLESHOT THE LANDING GEAR SYS AND FOUND THE NOSE GEAR UPLOCK SWITCH PN 65-430087 TO BE DEFECTIVE. THE SWITCH WAS REPLACED WITH NEW AND FUNTIONAL CHECKS WERE SATISFACTORY.