As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHEN LANDING GEAR WAS RETRACTED ON TAKEOFF ALL THREE GEAR GREEN LIGHTS EXTINGUISHED BUT RED UNLOCK LIGHT REMAINED ON, GEAR WAS CYCLED , ALL INDICATIONS NORMAL. - TROUBLESHOT AND FOUND NLG ACTUATOR FAILED, REPLACED NOSE LANDING GEAR ACTUATOR IAW CE750 M/M CHAPTER 32-30-03 OPS AND LEAK CHECKED GOOD.