As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TAKEOFF OUT OF SLC NOSE GEAR FAILED TO COME UP AND HAD GEAR DISAGREE MESSAGE. GEAR DOWN PER QRH. GEAR DISAGREE MESSAGE DISAPPEARED. RETURNED TO SLC. REPLACED NOSE LANDING GEAR DOOR SELECTOR VALVE AND A NLG SELECTOR VALVE IAW MM 32-22-20 & 32-33-10. LANDING GEAR FUNCTION CHECK & NWS CHECK GOOD. NO LEAKS NOTED.