As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LOWER CARGO FIRE WARNING ILLUMINATED SHORTLY AFTER TAKEOFF, RETURNED TO FWA. LIGHT WENT OUT BEFORE LANDING. BITE TEST CARRIED OUT. FOUND THREE SMOKE DETECTORS WEAK IN THE AFT CARGO. REMOVED AND REPLACED THREE WEAK SMOKE DETECTORS, RESET THE SYSTEM. OPS CHECK ON GROUND FOUND NORMAL ON FORWARD AND AFT LOWER CARGO. (M)