CERTAIN MAXON WHEELCHAIR LIFTS, MODEL WL-7 AND WL-7A, P/NOS 266700-05, 266700-07, 266700-08, 268000-03, AND 268000-04, MANUFACTURED BETWEEN APRIL 1, 2005, AND MAY 20, 2006, INSTALLED AS ORIGINAL EQUIPMENT ON VARIOUS BUSES AND SOLD AS REPLACEMENT EQUIPMENT. BENDING OCCURS ON THE LOCKING BRACKET ATTACHMENTS AND IN THE RAMP EXTRUSION WHICH FAIL TO CONFORM TO THE LOADING REQUIREMENT OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 403, PLATFORM LIFT SYSTEMS FOR MOTOR VEHICLES.