As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 874 - LAX-FWA - DURING CRUISE, THE FLIGHT CREW NOTICED THAT ONE AFT CARGO SMOKE DETECTOR LIGHT ILLUMINATED. REMOVED AND REPLACED BATTERIES IN THE SMOKE DETECTOR AND THE SYSTEM OPS CHECKED GOOD. THE AIRCRAFT WAS RETURNED TO SERVICE. (M)