As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENROUTE FLIGHT ATN531, CREW REPORTS-MSG DISPLAY NR 1 LOWER CARGO FIRE EXTINGUISHER BOTTLE DISCHARGED. POST LANDING, MAINTENANCE VERIFIED BOTTLE DISCHARGED. FIRE BOTTLE RECHARGED. INITIATED DEFERRAL MAINTENANCE ITEM 54132 CAT C.BY ELECTRICAL METHOD BOTTLE WILL BE VERIFIED TO BE FULLY CHARGED EACH DAY DEFERRAL REMAINS ACTIVE. WORK IN PROGRESS.