As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED, DURING FLIGHT THAT THERE WAS A LOUD BANGING NOISE FROM THE GALLEY SERVICE DOOR. THE CREW DIVERTED AND LANDED WITHOUT INCIDENT. MAINTENANCE FOUND THE GALLEY SERVICE DOOR LOWER TRIM STRIP TO BE UNSECURED. THE GALLEY SERVICE DOOR TRIM STRIP WAS RE-SECURED WITH NO FURTHER DEFECTS NOTED.