the lavatory. the scepter of the fire damage. investigators immediately suspect an arching event. >> the electricity that is flowing through a wire is over time insulation can chafe, can crack, and these cracks allow the electricity to not flow down too wire path as it's supposed to. but to jump to a part of the flame on the airplane. >> weight on an airplane is something you try to keep to an absolute minimum. one way to do that is to utilize small but powerful electric motors. so a very smeart motor can get three boosts of electricity as it winds down. >> the motor inside the lavatory is surprised with three phrase power. much stronger than a typical household current. electricity jumping from one of these wires would release an