What was found
SMOKE CARGO MESSAGE IN FLIGHT... A/C RETURNED TO ATL AFTER T/O... A/C SWAP TO 699, FLT 4552 DEL 114 MINS (AN EMERGENCY WAS DECLARED)
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
SMOKE CARGO MESSAGE IN FLIGHT... A/C RETURNED TO ATL AFTER T/O... A/C SWAP TO 699, FLT 4552 DEL 114 MINS (AN EMERGENCY WAS DECLARED)