As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER T/O RECEIVED SMOKE TOILET CAUTION MSG F/A CONFIRMED SMOKE IN REAR OF CABIN. (EMERGENCY DECLARED -- ACFT RETURNED TO DEPARTURE AFTER T/O) INSPECTED AFT LAV ENCLOSURE NO DEFECTS NOTED IAW AMM 25-41-00. SUSPECT LAV EXHAUST FAN IS BAD. R & R LAV EXHAUST FAN IAW AMM 21-23-13. OPS CK GOOD. NO FURTHER EVIDENCE OF SMOKE AT THIS TIME.