As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAH - FLT 3749 - THE CREW REPORTED A LAV SMOKE DETECTION LIGHT ILLUMINATED AFTER TAKEOFF. THE AIRCRAFT RETURNED TO IAH WHERE IT LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED THE AIRCRAFT, RAN THE ENGINES AND, AIRCONDITIONING PACKS WITH NO DISCREPANCIES NOTED, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE. (M)