ENGINE COOLING FAN BLADE SEPARATION
THE OFFICE OF DEFECTS INVESTIGATION OPENED A PRELIMINARY EVALUATION (PE)03-015 ON APRIL 15, 2003, BASED ON THREE REPORTS ALLEGING THAT FAN BLADES SEPARATED FROM THE ENGINE ELECTRONIC COOLING FAN.ALL THREE VEHICLES WERE WINNEBAGO RIALTA CLASS C MOTOR HOMES BUILT ON A VOLKSWAGEN EUROVAN CHASSIS.DURING THE PE INVESTIGATION, VOLKSWAGEN PROVIDED 125 ADDITIONAL REPORTS OF FAN FAILURES.THE ADDITIONAL REPORTS INCLUDED 107 REPORTS ON RIALTA VEHICLES (ALL USING A SIEMENS MANUFACTURED COOLING FAN) AND 18 REPORTS ON EUROVAN VEHICLES (15 USING SIEMENS FANS AND 3 USING BOSCH FANS).AN ENGINEERING ANALYSIS INVESTIGATION (EA03-013) HAS BEEN OPENED FOR FURTHER STUDY.