What was found
BEGINNING 9-20-99 AT 646.5 HOBBS, COWL FLAP ACTUATOR WAS REPLACED. A PART WAS ORDERED THROUGH BEECHCRAFT. THE NEXT FAILURE OCCURRED AT 9-30-99 AT 672.4 HOBBS, AND, THEREAFTER, 10-19-99 AT 704.7 HOBBS, 11-4-99 AT 763.0 HOBBS, AND 11-30-99 AT 840.8 HOBBS. AT EACH FAILURE, THE COMPONENT WAS REPLACED WITH A NEW OR OVERHAULED PART WITH A BEECHCRAFT PART NUMBER. ALL FAILURES OCCURRED UNDER NORMAL OPERATING CIRCUMSTANCES AND SEEM TO HAVE A LIFE LIMITED TIME OF AN AVERAGE 48.5 HOURS.