As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: FUMES SMELLED IN ENTIRE AIRCRAFT FROM ABOUT 18K FEET UNTIL LANDING. ACRID IN BACK CABIN. MORE OF A BURNING SMELL IN COCKPIT. LIKE AN ELECTRIC HEATER OR THE OVENS BEING USED SMELL. MAINTENANCE FOUND BAD BURNING ELEMENT AND REPLACED #2 OVEN IAW AMM 25-35-19.