As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF WHEN GEAR WAS SELECTED UP ALL GREEN LIGHTS EXTINGUISHED THEN RED LIGHT EXTINGUISHED FOLLOWED BY NOSE GEAR GREEN LIGHT COMING ON WITH NOISE OF NOSE GEAR DOWN RECYCLED GEAR WITH SAME RESULT. REPLACE NLG ACTUATOR AND NLG UPLOCK ACTUATOR OPERATIONAL AND LEAK CHECKS WERE GOOD. MAINTENANCE IAW CE560 XL MM CH 32-30-03.