BLUE BIRD CORPORATION (BLUE BIRD) IS RECALLING CERTAIN MODEL YEAR 2010 THROUGH 2013 ALL AMERICAN AND VISION NON SCHOOL BUSES MANUFACTURED FROM MAY 30, 2009, THROUGH APRIL 4, 2012 AND EQUIPPED WITH AIR BRAKES. THE PRIMARY AND SECONDARY AIR BRAKE LINES MAY HAVE BEEN CROSSED AT THE BRAKE TREADLE VALVE. INCORRECT INSTALLATION OF THE AIR BRAKE LINES AT THE AIR BRAKE TREADLE VALVE FAILS TO CONFORM WITH THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 121, “AIR BRAKE SYSTEMS.”