As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE NR 2 COFFEEMAKER IN FORWARD GALLEY BEGAN TO SMOKE DURING PUSHBACK FROM GATE. THE AIRCRAFT WAS RETURNED TO THE GATE. MAINTENANCE FOUND THE NR 2 COFFEEMAKER PRINTED CIRCUIT CARD BURNED. THE COFFEEMAKER WAS REMOVED AND REPLACED, OPERATION CHECKED GOOD.