As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SMOKE TOILET CAUTION MESSAGE DURING CLIMB-OUT. COMPLIED WITH QRH, AIR RETURN TO PHL. NO OVERWEIGHT LANDING 41,000 LBS, NO VISUAL SMOKE IN LAV OR CABIN. INSPECTED LAV, FOUND SMOKE DETECTOR OK. PERFORMED OPS CHECK IAW AMM 26-16-01-710-801. NO DEFECTS NOTED. REMOVED AND REPLACED LEFT AND RIGHT COALESCER BAGS IAW AMM 21-51-13. OPS CHECK GOOD. NO SMOKE NOTED. (M)