N5753B
BELL 206L-1
AN ATP RATED HELICOPTER PILOT WAS LANDING ON A HELIPAD ATOP AN OIL PLATFORM IN THE GULF OF MEXICO. UPON TOUCHDOWN, THE RIGHT REAR LANDING SKID COLLAPSED CAUSING THE TAIL ROTOR TO STRIKE THE DECK. AS THE PILOT APPLIED COLLECTIVE PITCH TO LEVEL THE AIRCRAFT, THE AIRCRAFT STARTED SPINNING. THE HELICOPTER'S MAIN ROTOR BLADES STRUCK THE DECK AND SEPARATED AS THE FUSELAGE SPUN OFF THE HELIDECK, LANDING ON A LOWER DECK. METALLURGICAL EXAMINATION REVEALED THAT THE FAILURE WAS DUE TO HIGH CYCLE LOW STRESS FATIGUE.
FAILURE OF THE HELICOPTER'S AFT LANDING GEAR CROSSTUBE ASSEMBLY DUE TO FATIGUE.
Source: NTSB Aviation Accident Database
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