As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AUS - CREW REPORTED VIBRATIONS FROM NOSE GEAR AREA. EMERGENCY DECLARED FLIGHT RETURNED AUS LANDED WITHOUT INCIDENT. FOUND LEFT FORWARD NOSE GEAR DOOR PARTIALLY OPEN ON ARRIVAL. INSPECTED NOSE GEAR DOOR RELEASE MECHANISM AND LINKAGE-NO DEFECTS/DAMAGE NOTED. VERIFIED DOORS SECURED CLOSED. SYSTEM GROUND CHECK NORMAL OPERATION.