As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAXI, WHILE CROSSING THE HOLD SHORT FOR TAKEOFF, THE FORWARD CARGO FIRE LIGHT ILLUMINATED. CREW PERFORMED QRH CARGO FIRE PROCEDURES DISCHARGING CARGO FIRE BOTTLES WITH INDICATION REMAINING. CREW PERFORMED QRH EVACUATION OF ACFT. ALL SLIDES DEPLOYED, ACFT WAS CLEARED. MAINTENANCE LATER CHANGED FIRE BOTTLES AND SLIDES AND INSPECTED ACFT.