As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 4460 - DURING CLIMB-OUT FROM DFW-LEX, AT APPROXIMATELY 27,000 FEET THE CREW RECEIVED A NOSE DOOR OPEN WARNING MESSAGE. QRH PROCEDURES WERE COMPLIED WITH AND AN EMERGENCY DECLARED. THE MESSAGE EXTINGUISHED WHEN THE GEAR WAS DOWN AND LOCKED. THE AIRCRAFT DIVERTED TO XNA, LANDING SAFELY. MAINTENANCE REMOVED AND REPLACED THE LEFT NOSE DOOR PROXIMITY SENSOR. OPERATIONAL AND LEAK CHECKS GOOD. AIRCRAFT OK FOR SERVICE. (M)