As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB THE LANDING GEAR LEVER WOULD NOT GO TO THE UP POSITION. USING THE DOWNLOCK RELEASE BUTTON THE GEAR RETRACTED SUCCESSFULLY BUT THE NOSE GEAR DOORS REMAINED OPENED. AIRCRAFT RETURNED TO IAH LANDED WITHOUT INCIDENT. REPLACED THE NLG DOOR SEQUENCE SWITCH AND OPERATIONALLY CHECK GOOD. AIRCRAFT APPROVED FOR SERVICE.