As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW - FLT 1086 - EN ROUTE YVR-DFW, A DISTINCT SMELL OF HOT BURNING PLASTIC WAS DETECTED. SMELL DISSIPATED IN TEN MINUTES. CONTINUED FLIGHT AND LANDED DFW WITHOUT INCIDENT. REPLACED APU AND AIRCRAFT COALESCER WATER SEPARATOR BAGS AND ACCOMPLISHED PACK BURNOUT PER THE MM. SYTEM GROUND CHECKED NORMAL OPERATION. (M)