As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT CARGO FIRE ILLUMINATED ON CLIMB OUT FL250 DECLARED EMERGENCY; RETURNED TO DAL. DISCHARGE FIRE BOTTLE IN AFT CARGO. R & R CARGO FIRE EXTINGUISHER BOTTLE AND CARGO ELECTRONIC UNIT(CEU) PER AMM 26-23-01 AND AMM 26-16-02. OPS TEST GOOD