As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
JFK - FLT NR 740 - DURING CRUISE AFT GALLEY SERVING CART NR 4, EMITTED SMOKE AND ELECTRICAL ODOR. TURNED OFF AND DISCONNECTED CART, MFG P/N 88801-1. FOUND MALFUNCTIONING HEATING PLATES. REPLACED SERVING CART AND OPERATION CHECKED NORMAL.