What was found
BHM/PHL - FLT 5768 - AIRCRAFT WAS AT CRUISE ALTITUDE WHEN THE EICAS SYSTEM INDICATED SMOKE IN THE CARGO BAY. THE CREW DECLARED AN EMERGENCY, DISCHARGED THE CARGO FIRE EXTINGUISHER BOTTLES AND DIVERTED TO RDU WHERE AIRCRAFT LANDED WITHOUT INCIDENT. AIRCRAFT WAS SUBSEQUENTLY FERRIED TO BHM. MAINTENANCE TROUBLESHOT, NO DISCREPANCIES FOUND. CARGO BOTTLES WERE REMOVED AND REPLACED SINCE THEY WERE DISCHARGED DURING THE INCIDENT. AIRCRAFT WAS RETURNED TO SERVICE. (X)