As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: PLASTIC BURNING ODOR THROUGHOUT THE CABIN. STRONGER ODOR TOWARDS THE FRONT OF THE AIRCRAFT. PERFORMED 09L00021001 AND FOUND NUMBER 1 OVEN HAS EVIDENCE OF BURNING PLASTIC. REMOVE AND REPLACED NUMBER 1 OVEN. PER AMM 25-35-03. GROUND OPS CHECKS GOOD AT THIS TIME NO SMELL.