As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE CREW REPORTED A BURNING ODOR IN FLIGHT AFTER THE F/O PRESSED THE F/O'S SIDE PA BUTTON WITH NO SMOKE NOTED. THE ACFT LANDED WITHOUT INCIDENT. MX INSPECTED THE ACFT, R & R THE F/O AUDIO CONTROL PANEL, AND THE F/A AFT HANDSET AND PA AMPLIFIER AS A PRECAUTION. THE SYS OPS TESTED WITH NO DEFECTS AND THE ACFT WAS APPROVED FOR RETURN TO SERVICE.