As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 2099, PHL - DFW, DURING CRUISE AT FL 390 THE CAPTAIN REPORTED VIA ACARS FUMES & DECLARED AN EMERGENCY. FLIGHT LANDED UNEVENTFULLY & TAXIED TO THE GATE. CAPTAIN ADVISED FUMES OF A BURNING PLASTIC SMELL REPORTED IN COCKPIT & CABIN. R & R THE NR 1 ENG.