As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APPROXIMATELY 40 MINUTES INTO FLIGHT, AFTER FLIGHT ATTENDANT STARTED USING OVEN, A STRONG ACRID ODOR ENTERED COCKPIT, ALSO NOTICED A SMOKEY HAZE IN MICROWAVE COMPARTMENT. OVEN USE WAS DISCONTINUED & ODOR DIMINISHED. R & R OVEN ASSEMBLY WITH A REPAIRED UNIT. VERIFIED OVEN HEATS UP & NO ODOR PRESENT IAW MM 20-43-00.