What was found
DURING A MAINTENANCE CHECK FLIGHT PILOT NOTICED A UNUSUAL VIBRATION. PILOT LANDED WITHOUT INCIDENT. UPON INSPECTION MECHANIC FOUND A CRACK IN THE MAIN ROTOR BLADE P/N 109-0103-01-9 S/N 1841R. THE CRACK STARTED AT A REPAIR IN THE BLADE. THE BLADE WAS REPLACED WITH A SERVICEABLE BLADE P/N 109-0103-01-9 S/N 1888R. GROUND RUN AND MAIN ROTOR BALANCE COMPLIED WITH.THE DEFECTIVE BLADE WAS SENT TO AGUSTA AEROSPACE CORP. IN PHILADELPHIA, PA. NO DEFECTS NOTED. ALL WORK DONE I.A.W. A109AII M.M. CHAPTER 65.THIS AIRCRAFT IS FROM OUR AIRLIFT NORTHWEST OLYMPIA,WA BASE.