What was found
(CAN) SMOKE AFT LAV WARNING MESSAGE DURING ROTATION ON TAKEOFF. SMOKE FILLING THE CABIN REPORTED BY FAS. CORRECTIVE ACTION: UPON ARRIVAL TO AIRCRAFT IT SMELLED LIKE COMPRESSOR WASH FLUID BURNING SMELL. DUE TO RECENT COMPRESSOR WASH BEING DONE ON NR 2 ENGINE SUSPECT COMPRESSOR WASH RINSE WAS NOT DONE PROPERLY OR THOROUGHLY. PERFORMED COMPRESSOR WASH RINSE CYCLE, IN REFERENCE TO CRJ 700 AMM 72-00-00. OPERATED PACKS AND ENGINE AT CRUISE POWER FOR 30 MINUTES WITH NO DEFECTS NOTED. SEE ALSO FAA SDR #2019022301318/SWIA2018051744637. (TC# 20180510010)