As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LGA INFLIGHT T386/19NOV - FLIGHT ATTENDANT REPORTED HEARING TWO POPS AND SAW A SMALL AMOUNT OF WHITE SMOKE COMING FROM THE AFT GALLEY NUMBER FOUR COFFEE MAKER. FOUND NUMBER FOUR COFFEE MAKER HEATER ELEMENT CONNECTORS DISCONNECTED WITH EVIDENCE OF ARCHING. REPLACED NUMBER FOUR COFFEE MAKER. SYSTEM GROUND CHECKED NORMAL OPERATION.