As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DIVERSION/DECLARED EMERGENCY, AT FL 340 AFT CARGO FIRE ALARM ILLUMINATED FOR 5 SECS THEN WENT OUT. RAN QRH CHECKLIST TO INCLUDE BOTTLE / DISCREPANCY. GOT SECONDARY INDICATION OF FIRE WHEN BOTTLE DISCHARGED FOR 3 SEC THEN WENT OUT. COMPLIED WITH FIM TASK 26-16 TASK 801-NO FAULTS. R&R CARGO FIRE HALON BOTTLE PER MM.