What was found
APU HAD SHUTDOWN, FAULT LIGHT ILLUM AND EICAS MSG. APU FAULT DISPLAYED, HAD A STRONG PETROLEUM BURNING ODOR PRIOR TO AUTO-SHUTDOWN AND FAULT. THE FAILURE IS ATTRIBUTED TO COOLING FAN FAILURE. THE FAILURE OF BALL BEARING CAUSED THE COOLING FAN SHAFT TO BREAK IN HALF. THE HOUSING CAME APART IN PIECES. THE OIL THAT FEEDS THE FAN THEN STARTED SPRAYING ON THE APU INLET DUCT. THE OIL FUMES TRAVELED TO CABIN INTERIOR AND PRODUCED A STRONG ODOR. REPLACED COOLING FAN.