As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FSM - FLT NR 3690 - AFT CARGO SMOKE WARNING ILLUMINATED IN FLIGHT, BLEW FIRE BOTTLE AND DIVERTED TO FSM. RAI'D SMOKE DETECTOR (GROUND OPS CHECK GOOD) AND REPLACED FIRE BOTTLE. FALSE SMOKE WARNING, NO FIRE. AIRCRAFT RETURNED TO SERVICE. (M)