As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAXI OUT, F/A REPORTS HEARING LOUD POP AND SEEING SPARKS FLY OUT OF COFFEEMAKERS IN AFT GALLEY. F/A`S REPORT SMELLING ELECTRICAL SMOKE. INSPECTED COFFEEMAKERS AND COMPARTMENT WIRING, NO TROUBLE FOUND OR EVIDENCE OF ELECTRICAL ARCING. REPLACED AFT GALLEY COFFEEMAKERS 3 AND 4.