As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT DIVERTED DUE TO ACRID ODOR FROM AFT RIGHT SIDE GALLEY. NO SMOKE OR FUMES BUT A ODOR RESEMBLING PLASTIC BURNING. FOUND CHAR MARKS ON OVERHEAD CEILING PANELS AT ROWS 42 ABC AND 40 DEF CAUSED BY OVERHEAD LIGHT BALLASTS. R & R OVERHEAD LIGHT BALLASTS IAW AMM 33-21. OPS CHECKED GOOD.