What was found
DURING CRUISE, CABIN CREW NOTIFIED THAT THERE WAS AN ELECTRICAL ODOR IN THE REAR OF THE PASSENGER CABIN. NO VISIBLE SMOKE WAS PRESENT, NO ELECTRICAL ODOR IN THE FLIGHT DECK, NO WARNING OF ANY KIND. THE CREW PERFORMED QRH PROCEDURE BY TURNING OFF PAX SYS AND GALLEY PWR. ELECTRICAL ODOR SUBSIDED AND THE FLIGHT CONTINUED TO ITS DESTINATION. AFTER EXTENSIVE TROUBLE-SHOOTING, NO ISSUE WAS FOUND WITH THE SHIP SYSTEMS. POSSIBLE ROOT CAUSE WAS BELIEVED TO BE FROM THE PASSENGER'S PERSONAL ELECTRONIC DEVICE.