As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLIMBING THROUGH 6000-7000 FT, RECEIVED A SMOKE TOILET AMBER CAUTION MESSAGE. COMPLIED WITH QHR. PERFORMED AN OPS CHECK OF THE LAVATORY SMOKE DETECTOR IAW AMM 26-16-01. OPS CHECKED GOOD, MESSAGE NO LONGER EXISTS, ACFT RETURNED TO SERVICE. ON ANOTHER FLT, AFTER TAKEOFF RECEIVED A SMOKE TOILET CAUTION. COULD SMELL SMOKE AND SEE LIGHT SMOKE TOWARDS REAR OF CABIN. OPEN