As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON CLIMB-OUT, CREW REPORTED BANGING NOISE OUTSIDE OF L1 DOOR. FLIGHT RETURNED TO CLT. MAINTENANCE FOUND THE L1 DOOR SAFETY STRAP OUTSIDE OF DOOR. MAINTENANCE STOWED THE STRAP AND PERFORMED AN OVERWEIGHT LANDING INSPECTION. NO DEFECTS WERE NOTED.