As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT CRUISE A BUZZING SOUND FOLLOWED BY A BRIEF BURNT PLASTIC SMELL OCCURRED. BOTH SOUND AND SMELL IN THE AFT GALLEY WENT AWAY AFTER ALL GALLEY ELECTRICAL WAS TURNED OFF. FOUND DUSTY FAN INLET GRILL IN AFT GALLEY. NO BUZZING SOUND OR OTHER ISSUE PRESENT AFTER CLEANING. PERFORMED GVI IN AFT GALLEY AREA & GALLEY FAN OPS CK GOOD. NO 90 DAY HISTORY. REF A220 AMP 21-42. (LP# 7694645)