BASED ON THE RELATIVELY LOW FAILURE FREQUENCY MEASURED OVER AN EXTENDED EXPOSURE TIME AND THE FACT THAT THE GREAT MAJOITY OF INCIDENTS ARE CONFINED WITHIN THE BLOWER HOUSING, A SAFETY-RELATED DEFECT TREND HAS NOT BEEN IDENTIFIED AT THIS TIME AND FURTHER USE OF THE AGENCY RESOURCES DOES NOT APPEAR TO BE WARRANTED.THE CLOSING OF THIS INVESTIGATION DOES NOT CONSTITUTE A FINDING BY NHTSA THAT NO SAFETY-RELATED DEFECT EXISTS.THE AGENCY RESERVES THE RIGHT TO TAKE FURTHE ACTION IF WARRANTED BY THE CIRCUMSTANCES.