What was found
AFTER LANDING SYD RECEIVED LVL3 CARGO FIRE LWR FWD ALERT DISCHARGED BOTTLE AND COMPLETED QRH AFTER A/C STOPPED. ATC NOTIFIED AND FIRE CREW INSPECTED AREA AND FOUND COLD. REMOVED AND REPLACED NR 1 LWR CARGO FIRE EXTINGUISHER BOTTLE/CARTRIDGE. REMOVED AND REPLACED MSC. REMOVED AND REPLACED FWD CARGO OVERHEAT HEAT DETECTOR. REMOVED AND REPLACED 5 FWD CARGO SMOKE DETECTOR UNITS. REMOVED AND REPLACED MSC, REMOVED AND REPLACED CARGO HEAT DETECTOR.