As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF DURING GEAR RETRACTION NOSE GEAR FAILED TO RETRACT AND WAS ACCOMPANIED BY GEAR DISAGREE AND NOSE DOOR OPEN MESSAGES WITH GEAR INDICATION SHOWING BOTH MAINS WHITE AND THE NOSE YELLOW. RETURNED TO THE AIRPORT. PERFORMED LANDING GEAR OPERATIONAL CHECKS. SWUNG GEAR 15 CYCLES WITH NO DEFECTS NOTED AT THIS TIME. OPERATIONAL CHECKS SATISFACTORY.