As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NLG CAUTION MESSAGE WHEN GEAR WAS SELECTED IP AT 400FT. CREW SELECTED GEAR BACK DOWN AND DECLARED AN EMERGENCY AND RETURNED TO THE FIELD. NOSE LANDING GEAR CENTER/EXTENSION PROXIMITY SENSOR BRACKET WAS REPLACED DUE TO BEING BENT. MAINTENANCE PERFORMED AN OPS CHECK OF THE EXTENSION AND RETRACTION SYSTEM .