As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RETURNED TO DEPARTURE DUE TO A AFT CARGO FIRE INDICATION, FIRE BOTTLE BLOWN. AN EMERGENCY WAS DECLARED. QRH PROCEDURES COMPLIED WITH BOTTLE USED. THE AIRCRAFT WAS GROUNDED. REPLACED COCKPIT FIRE CONTROL PANEL IAW AMM 26-00-02. OPS AND LEAK CHECKED GOOD.