What was found
AT FL390, HAD AN ODOR THAT SMELLED LIKE HOT PLASTIC. AFTER ISOLATING SEVERAL THINGS & ODOR WENT AWAY AFTER TURNING OFF ENTRANCE/GALLEY HEATER & CHILLER ON GALLEY CMS SCREEN. RAN AVIONICS EQUIPMENT, & ATTEMPTED TO NOTICE ODORS AROUND AVIONICS COOLING FANS, PROCESSORS, ACCESSORIES & SCREENS. RAN ALL CABIN EQUIPMENT TO INCLUDE COFFEEMAKER, MICROWAVE, OVEN, WATER HEATER, LIGHTS & CABIN ENTERTAINMENT EQUIPMENT. RAN ENTRANCE SUPPLEMENTAL HEATER, CHILLER & VENT FAN. INSPECTED FOR FOD IN THESE AREAS INSIDE THE GALLEY AND ITS EXTERIOR DUCT OUTLETS. INSPECTED CONNECTIONS, RELAYS & PROCESSORS FOR HEAT & PROPER INSTALL. NO HOT PLASTIC SMELL DETECTED. A MODERATE AMOUNT OF ODOR OF PLASTIC & EPOXY COMES OUT OF THE JEPPESEN CASE WHEN IT IS OPENED, LIKELY FROM THE ACFT BEING LOW TIME & THE COMPOSITE NATURE OF CASE. JEPPESEN CASE (221CLF) REMOVED AND REINSTALLED IAW AMM 53-01-01. NO SMOKE OR SMELL OF BURNING NOTED AT ANY POINT WHILE IN CONTROL OF THE AIRCRAFT. FINDINGS WERE DISCUSSED WITH CRC, AND NO OTHER RECOMMENDATIONS WERE ADVISED.