What was found
STRONG BURNING ODOR FROM REAR GALLEY, FROM CHILLER AND CART VENTS. INSPECTED AFT GALLEY CHILLERS FOUND RT CHILLER INOP WITH STRONG BURNING ODOR. REPLACED AFT RT CHILLER PER MM. OPS CHECK OK. NO ODOR PRESENT. ALSO INSPECTED AFT EQUIPMENT AREAS NO BURNING SMELL NOTED. CHECKED LAVS AND GALLEY CEILINGS, NO TROUBLE FOUND. DURING INSPECTION FOUND AFT EXH FAN 1 INOP. ETOPS CATEGORY 'E': PROBLEMS WITH SYSTEMS CRITICAL TO ETOPS.