As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 3711, TOILET SMOKE CAUTION MESSAGE ON DEPARTURE. SLIGHT ODOR OF SMOKE IN CABIN. AIR RETURNED & EMERGENCY DECLARED. REMOVED AND REPLACED COALESCER SOCKS IAW AMM 21-51-13. PERFORMED SMOKED AND FUMES WORK SCOPE. FOUND SMOKE COMING FROM RIGHT PACK BINDING. AIRCRAFT IS OK FOR SERVICE.