As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE NOSE GEAR INDICATED UNSAFE WITH GEAR HANDLE UP AFTER TAKEOFF. THE AIRCRAFT WAS RETURNED TO DEN WHERE IT LANDED WITHOUT INCIDENT. MAINTENANCE FOUND THE NOSE STRUT FLAT. THE NOSE STRUT WAS SERVICED WITH FLUID AND NITROGEN. IN ADDITION, THE NOSE STRUT SEALS WERE REPLACED IAW MM 32-21-02. THE NOSE GEAR WAS SWUNG SEVERAL TIMES AND OPERATION CHECKED GOOD.