CHAMPION BUS IS RECALLING 503 MY 2005-2007 CHALLENGER, CRUSADER, DEFENDER, MY 2005-2006 CORPORAL, MY 2006 CTS-RE, AND MY 2007 CTS-FE AND IC DEFENDER TRANSIT BUSES EQUIPPED WITH A RICON PLATFORM STYLE WHEELCHAIR LIFT. THIS LIFT FAILS TO COMPLY WITH THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 403, “PLATFORM LIFT SYSTEMS FOR MOTOR VEHICLES.” THE ANTI-STOW INTERLOCK MAY NOT DETECT THE PRESENCE OF A WHEELCHAIR OR MOBILITY AID USER. THE PRESSURE SENSING SWITCH THAT DETECTS THE PRESENCE OF WEIGHT ON THE PLATFORM WAS NOT ADJUSTED TO THE NECESSARY SENSITIVITY LEVEL. THE LIFT COULD STOW EVEN THOUGH SOMEONE OR SOMETHING IS STILL ON THE LIFT.