As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE CREW REPORTED A LOUD SQUEALING NOISE FROM THE MAIN LANDING GEAR AREA OF THE FUSELAGE. THE FLIGHT RETURNED TO CLT AND LANDED WITHOUT INCIDENT. MAINTENANCE FOUND THE REFUEL DOOR OPEN. INSPECTION REVEALED NO DAMAGE. THE DOOR WAS PROPERLY SECURED AND THE AIRCRAFT WAS RELEASED FOR SERVICE.