As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHIP 5813 -SMK/FUME- A/C RETURNED TO GATE DUE TO AFT CARGO FIRE DETECTION ALERT AND THE SYSTEM DISCHARGED. CORRECTIVE ACTION: ACS REMOVED PASSENGER BAG WHICH CONTAINED A DAMAGED LITHIUM BATTERY. REPLACED RECIRCULATION FILTERS AND CARGO FIRE EXTINGUISHER BOTTLES.