As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LHR - FLT NR 86 - EN ROUTE ORD/LHR DURING CRUISE, SPARKS NOTED COMING FROM TOP OF NR 4 COFFEE MAKER IN B-C GALLEY. AIRCRAFT PROCEEDED LHR AND LANDED WITHOUT INCIDENT. REPLACED NR 4 COFFEE MAKER IN B-C GALLEY. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)