As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIR TURNBACK - PILOTS REPORTED THAT UPON TAKEOFF AND CLIMBING THAT THE GEAR HANDLE IN TRANSIT LIGHT WOULD NOT EXTINGUISH AFTER GEAR RETRACTION. MAINTENANCE REMOVED AND REPLACED THE NOSE AND RIGHT HAND MAIN UPLOCK SWITCHES. MAINTENANCE RIGGED THE SWITCHES AND THE OPERATIONAL CHECKS WERE GOOD REFERENCE 1900D MM 32-60-00-201. RII INSPECTION COMPLIED WITH PER TASKCARD 4.3.8 FOR THE INSTALLATION AND RIGGING.