THIS VEHICLE WAS INVOLVED IN A CHAIN EFFECT CRASH WHICH WAS NOT RELATED TO THIS EQUIPMENT FAILURE. THE FAILURE OCCURRED DURING THE CRASH. WHEN HIT FROM THE REAR AND PUSHED INTO ANOTHER VEHICLE, THE SEAT OF THE CAR BROKE IN TWO WAYS; THE BACK OF THE SEAT COLLAPSED AND THE BOTTOM PART OF THE SEAT TWISTED SLIGHTLY. THE CAR WAS DRIVABLE FROM THE SCENE OF THE ACCIDENT. OF FOUR VEHICLES INVOLVED, THIS VEHICLE WAS THE ONLY ONE WHICH SUSTAINED SEAT DAMAGE. THE OTHER THREE VEHICLES HAD TO BE TOWED FROM THE SCENE. *JB