As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 1800 - MCO-CLT - AT 75K, GOT AFT LOWER FIRE WARNING INDICATION. CREW DECLARED AN EMERGENCY. AIRCRAFT MADE AN UNEVENTFUL REJECTED TAKEOFF (75K) IN MCO. REMOVED AND REPLACED LOWER AFT CARGO SMOKE DETECTORS BATTERIES. SMOKE DETECTOR SYSTEM TEST GOOD. AIRCRAFT WAS RETURNED TO SERVICE. (M)