As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAXI OUT, 2 FLIGHT ATTENDANTS NOTICED BURNING PLASTIC ODOR CONCENTRATED NEAR CEILING AIR VENT IN FORWARD GALLEY. MAINTENANCE TROUBLESHOT IAW FIM. NO FINDINGS. RAN ENGINES. NO FINDINGS. PERFORMED MINI-DUCT BURNOUT PER NO-GO ODI WC 4950-20001.