What was found
(CAN) UPON LANDING IN A BRUSH AREA, THE PILOT LOWERED THE COLLECTIVE, WHICH IN TURN RAISED (2) TREES THAT WERE SITUATED ON THE LEFT AND THEN HIT THE ROTOR DISK. THE PILOT THEN DISPLACED THE AIRCRAFT TO THE RT. AN ENGINE SHUTDOWN WAS PERFORMED AND VISUAL INSPECTION CARRIED OUT. THE ROTOR RPM DID NOT DECREASE UPON IMPACT WITH THE TREES, ONLY A COLLISION SOUND WAS NOTED. PRIOR TO ENGINE SHUTDOWN, ALL ENGINE PARAMETERS WERE NORMAL. THE VISUAL INSPECTION REVEALED THAT THE BLADE WEIGHTS WERE MISSING AT THE BLADE TIPS (3.5 - 4 INCHES). (TC NR 20070814002)