As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) CREW RECEIVED A FORWARD CARGO COMPARTMENT SMOKE DETECTED WARNING. THE C1 CARGO COMPARTMENT WAS EMPTY DUE TO A MEL ITEM FOR AN INOPERATIVE FIRE EXTINGUISHING SYSTEM. THE FLIGHT DECLARED A MAYDAY WITH ATC AND LANDED. RT ENGINE WAS SHUTDOWN AND THE TRUCKS MET THE ACFT WHERE THE CARGO COMPARTMENT WAS INSPECTED. THERE WAS NO EVIDENCE OF FIRE. TAXIED TO THE TERMINAL AND SHUTDOWN AT GATE. PASSENGERS WERE DEPLANED. FIRE EXTINGUISHER PANEL REPLACED IAW AMM 26-20-01.