As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) SMOKE AFT LAV ON CLIMB-OUT. CREW RETURNED TO DEPARTURE AIRPORT. ENGINE COMPRESSOR WASH HAD BEEN CARRIED OUT DURING MX NIGHT PREVIOUS TO FLIGHT DEPARTURE. MX CARRIED OUT POST COMPRESSOR WASH CHECK LIST IAW AMM 72-00-00. NO FUTHER DEFECT NOTED. TEST FLIGHT ALSO PERFORMED WITH NO DEFECTS NOTICED. ACFT RETURNED TO SERVICE.