As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT ATTENDANTS REPORT PLASTIC BURNING FUMES AT ROWS 2-4. RAN SMOKE; FIRE OR FUMES QRH. FUMES EXTINGUISHED. RESTORED PWR TO ALL SWITCHES NO FUMES NOTED REMAINDER OF FLIGHT WAS NORMAL<[01] ACCOMPLISHED SMOKE/FUMES IN CABIN CONDITIONAL INSPECTION REF AMM 05-51-56; NO FUMES/ABNORMAL SMELL NOTED OK FOR CONT SERVICE