As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 51 - SFO-JFK - AFT CARGO FIRE WARNING CAME ON DURING DESCENT, FOLLOWED EMERGENCY CHECKLIST, DISCHARGED NR 1 FIRE BOTTLE. LOWER CARGO FIRE BOTTLE NR 2 PUSHBUTTON WOULD NOT PUSH IN TO DISCHARGE THE FIRE BOTTLE. REMOVED AND REPLACED LOWER CARGO FIRE PROTECTION MODULE DUE NR 2 FIRE BOTTLE PUSH BUTTON WOULD NOT PUSH IN PER MM 26-23-01. OPS CHECK OK PER MM 26-23-00, PAGE 501. (M)