As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER PUSH BACK AND ALL 3 ENGINES START RECEIVED CARGO FIRE LWR FWD LEVEL 3 ALERT WITH TRITONE SEVERAL TIMES FOLLOWED BY CARGO FIRE AGENT DISCHARGE SWITCH FLASHING. FOLLOWED QRH DISCHARED 1 FIRE BOTTLE. R & R THE MISCELLANEOUS SYSTEMS CONTROLLER AS A PRECAUTIONARY MEASURE IAW MM 31-42-01-4. PERFORMED SUCCESSFUL ADJUSTMENT & TEST OF THE IAW MM 31-42-01-5. ACFT IS RELEASED FOR SERVICE.