What was found
MECHANIC CONDUCTING DAILY INSPECTION OF THE TAIL ROTOR ASSY HEARD "CRUNCHING" SOUNDS WHEN FLEXING THE BLADES. A BOROSCOPE INSP OF THE INTERNAL CUFFS REVEALED FIBERGLASS FIBERS PROTRUDING FROM THE SPAR AND A CRACK THROUGH THE RUBBER BLOCK AND INTO THE BLADE IN THE BOTTOM OF THE CUFF OF ONE SIDE OF THE BLADE. THE APPEARANCE GAVE THE IMPRESSION OF BEING RESIN POOR AND SEVERAL OTHER MFG DEFECTS APPEAR TO HAVE OCCURRED. TIGHTER QUALITY CONTROL DURING THE MFG PROCESS MAY HAVE CAUGHT OR ELIMINATED THIS PROBLEM.