As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INSPECTION TYPE:N/A LOWER CARGO SMOKE LIGHT ILLUMINATED ON TAKEOFF. WARNING INDICATED SECTION C. AIR TURNBACK. INSPECTED PIT 33 DETECTORS, FOUND WATER INTRUSION ON ALL DETECTOR UNITS. DRIED ALL DETECTORS AND DEFERRED SYSTEM. OPS CHECK NORMAL.