What was found
WHILE PERFORMING AN 800 HOUR INSP OF THE MAIN ROTOR BLADES, FOUND 2 BLADES THAT THE BEARING PIN, EXPANSION BOLT, AND NUT WERE NOT INSTALLED PROPERLY BY THE MFG. BOTH EXPANSION BOLTS WERE BROKEN DURING REMOVAL FOR THE FIRST 800 INSPECTION INTERVAL ON THESE BLADES. THE BEARING PIN HAD SLOTS IN IT AND THE NUT HAS TABS ON AND THEY LOCK TOGETHER. WHEN THEY ARE PROPERLY LOCKED 1 TO 2MM OF THREAD MUST PROTRUDE THROUGH THE NUT. WE HAVE ISSUED A QAN TO INSPECT THE BOLTS FOR PROPER SEATING AND HAVE CONTACTED THE MFG.