CERTAIN MOTOR HOMES FAIL TO CONFORM TO THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 121, 'AIR BRAKE SYSTEMS.' TWO DELIVERY LINES ON THE BRAKE SYSTEM WERE INSTALLED INCORRECTLY.
ON CERTAIN CLASS A MOTOR HOMES, THE SPACER PLATE UNDER THE TRAILING ARMS HAD A TRANSVERSE WELD WHICH CREATES A HEAT RISER AND CAUSE THE TRAILING ARMS TO CRACK.