BLUE BIRD IS RECALLING CERTAIN MODEL YEAR 2007 THROUGH 2010 ALL AMERICAN NON SCHOOL BUSES MANUFACTURED FROM JULY 16, 2006 THROUGH AUGUST 3, 2010 EQUIPPED WITH CUMMINS ISB-02, ISB-07, AND ISB-10 ENGINES. AN INCORRECT COMBINATION OF FLAT WASHER AND SERRATED NUT WAS INSTALLED ON THE BOLT THAT SECURES THE STARTER CABLE RETAINING CLAMP TO ITS ATTACHING BRACKET AT THE FRONT OF THE ENGINE ABOVE THE ENGINE COOLING FAN. THE FLAT WASHER PREVENTS THE SERRATED NUT FROM LOCKING AGAINST THE ATTACHING BRACKET. OVER TIME, THE SERRATED NUT MAY BACK OFF ALLOWING THE STARTER CABLE TO FALL AND CONTACT THE FAN HUB WHILE IN OPERATION.