What was found
ON TAXI OUT, TOWER NOTIFIED OF APU FIRE, NO COCKPIT INDICATION. DISCHARGED BOTTLE, INSPECTED APU AREA AND EXHAUST FOR DAMAGE AND SMOKE, NONE FOUND. INSPECTED TAIL SECTION AREA FOR DAMAGE, NONE FOUND. APU DEFFERED PER MEL 49-11-01A. SUSPECT TAIL PIPE FIRE, FERRIED TO LAX. REPLACED APU, ROUTED TO SHOP.