As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
F/A "B" DETECTED A BURNING RUBBER ODOR NEAR REAR OF CABIN , FLOW CONTROL ON MAX TO COOL CABIN. LATER ON BOTH F/A'S SAW A KIND OF MIST INSIDE CABIN THAT DISAPATED. CONSULTED WITH FLIGHT CREW. NOTED " NO MIST NOTED IN CABIN" C/W SL DH8-400-SL-21-012A NO DEFECTS NOTED. NO ODOR IN CABIN NOTED. INTERROGATED CDS NO FAULTS NOTED. ACFT OK FOR CONT SERVICE. NO PARTS REPLACED.