BLUE BIRD HAS NOTIFIED NHTSA ABOUT A DEFECT IN CERTAIN MODEL YEAR 2010 ALL AMERICAN, CONVENTIONAL, AND MICRO BIRD SCHOOL BUSES MANUFACTURED FROM APRIL 24 THROUGH NOVEMBER 14, 2009 EQUIPPED WITH CERTAIN RICON S SERIES AND K SERIES L-MODEL WHEELCHAIR LIFTS. THERE IS A PROBLEM IN THE SOFTWARE THAT CONTROLS THE LIFT’S “UP” FUNCTION. IF THE “UP” SWITCH IS RELEASED BEFORE THE FLOOR LEVEL LIMIT SWITCH IS ACTIVATED, THE LIFT MAY CONTINUE ITS UPWARD TRAVEL FOR APPROXIMATELY 1 SECOND BEFORE STOPPING. THE CONTINUED UPWARD TRAVEL MAY OVERRUN THE FLOOR LEVEL CUT OFF POINT.