As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PVG - CREW REPORTED SLIGHT ELECTRICAL BURNING SMELL AT SEATD 24-25HJ. CREW DEACTIVED POWERPORT SYSTEM AND IN-FLIGHT ENTERTAINMENT. FLIGHT LANDED PVG WITHOUT INCIDENT. DEFERRED POWERPORT SYSTEM PER NEF 25-25B. REPLACED POWERPORT POWER SUPPLY AT SEAT 25HJ AT ORD ON 11/29/2012. SYSTEM GROUND CHECK NORMAL OPERATION.