As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON GEAR RETRACTION THE GEAR UNLOCKED LIGHT WOULD NOT EXTINGUISH, GEAR EXTENDED NORMALLY ON RECYCLE WITH 3 GREEN LIGHTS, ACCOMPLISHED AIR TURN BACK TO TEB. PERFORMED GEAR SWING AND FOUND GEAR UNSAFE LIGHT EXTINGUISHED WITH EVERY RETRACTION AND EXTENSION OF LANDING GEAR. SYSTEM OPERATES NORMAL AT THIS TIME, ALL WORK PERFORMED IAW CE560 MM. CHAPTER 7-10-00 & 32-01-00.