As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT RETURNED TO PLATFORM DUE TO DURING PUSH BACK, CAPTAIN REPORTED BELL SOUNDS OF FIRE IN FWD CARGO COMPARTMENT; SO THE FLIGHT CREW PERFORMED THE QRH 8.15 AND 8.16 PROCEDURES; AIRCRAFT WAS SENT TO THE HANGAR AND MAINTENANCE PERSONNEL PERFORMED REVISION AT FIRE EXTINGUISHING BOTTLE SYSTEM IAW AMM 26-20-00, DUE TO THE FIRE EXTINGUISHING BOTTLE WAS ACTIVATED; THE FIRE EXTINGUISHING BOTTLE WAS REPLACED IAW AMM 26-23-01, TESTED CORRECT.