What was found
FLIGHT CREW RECEIVED AN AFT CARGO SMOKE MESSAGE. CREW RAN QRH, DISCHARGED CARGO FIRE BOTTLES, DECLARED AN EMERGENCY AND RETURNED TO PIT WHERE THEY LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED, R & R GENERATOR INOPERATIVE IN MAU 3 IAW AMM AND OPS CHECKED GOOD. ACFT IS GOOD FOR SERVICE.