As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NOSE LANDING GEAR WOULD NOT RETRACT AFTER TAKEOFF. MAINTEANCE DID MULTIPLE GEAR SWINGS BUT COULD NOT DUPLICATE THE PROBLEM. THE ACTUATOR WAS REMOVED AND PUT IN A TEST STAND WHERE IT FINALLY FAILED STAYING IN THE LOCKED POSITION. A OVERHAULED ACTUATOR WAS INSTALLED AND THERE HAS BEEN NO MORE PROBLEMS REPORTED.