As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) PAX/CABIN CREW REPORTED SMOKE IN FWD LAV AREA, BURNING SMELL IN THE CABIN FROM FWD GALLEY TO SEAT ROW 25. T/S REVEALED COLLAPSED RT RECIRCULATION FILTER. NO OTHER ABNORMALITIES WERE FOUND/REPORTED. IT IS SUSPECTED THAT FILTER COLLAPSED DUE TO HEAVY CONTAMINATION & CLOGGING.