As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
JUST PASSING 1,000 AGL GOT A AFT CARGO FIRE LIGHT, LIGHT WENT OFF ABOUT 10 SEC. LIGHT CAME BACK ON SEVERAL TIMES, TESTED AFTER WE LANDED & IT FAILED TEST. REMOVED AND REPLACED CARGO FIRE DETECTION MODULE, AS PER MM. REF 26-00-02. OPS CHECK GOOD.