What was found
HELICOPTER WAS ON A FINAL APPROACH TO LANDING SITE ON ISLAND OF KAHOOLAWE, HAWAII. PILOT EXPERIENCED A YAW TO THE ACFT. HE MADE A NORMAL LANDING ON THE HELIPAD AND SHUT DOWN ENGINE. POST-FLIGHT CHECK REVEALED THE POWER TURBINE BLADES WERE DAMAGED. UPON DISASSEMBLY AND INSPECTION OF ENGINE, DETERMINED THE SECOND STAGE GAS GENERATOR TURBINE BLADE BROKE AWAY AT THE ROOT AND CAUSED ADDITIONAL DAMAGE TO THE SECOND STAGE GAS GENERATOR BLADES, POWER TURBINE NOZZLE, AND POWER TURBINE BLADES. SIGNIFICANT RUBBING WAS EVIDENT ON COMPRESSOR, GAS GENERATOR, AND POWER TURBINE COMPONENTS.