As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIR RETURN, NOSE DOOR WARNING MESSAGE AFTER GEAR RETRACTION. MESSAGE WENT OUT AFTER 20 SECONDS. REMOVED AND REPLACED THE NOSE GEAR DOOR SELECTOR VALVE PER AMM 32-22-20. FIM 32-60-00 COMPLETED. PERFORMED GEAR SWINGS. ALL CHECKED GOOD AT THIS TIME. AIRCRAFT OK FOR SERVICE.