As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SMOKE/BURNING PLASTIC SMELL IN THE FLIGHT DECK. WAS STRONGER WITH THRUST LEVERS IDLE. FLIGHT ATTENDANTS NOTICED THE SMELL BUT WAS MUCH STRONGER IN FLIGHT DECK. UNABLE TO DETERMINE IF SMOKE WAS VISIBLE DUE TO BEING NIGHT TIME. SEEMED TO IMPROVE ONCE ON THE GROUND BUT STILL LINGERED WITH BLEEDS TRANSFERRED TO APU (FLIGHT 3941 - FILED OPEN) THIS IS CURRENTLY A WORK IN PROGRESS