N5747Z
BELL 206B
THE PILOT LANDED THE HEICOPTER ON A DRILLING PLATFORM AND INSTRUCTED THE MECHANIC TO INSTALL ONLY THE FORWARD TIE-DOWNS. THE MECHANIC SECURED THE FORWARD AND AFT TIE-DOWNS AND SECURED THE FORWARD ROTOR BLADES. WHEN THE PILOT RETURNED TO THE HELICOPTER, HE REMOVED THE ROTOR BLADE TIE-DOWN AND THE FORWARD TIE-DOWNS, BUT NOT THE AFT TIE-DOWNS. AFTER LIFT-OFF, THE HELICOPTER BECAME AIRBORNE IN A NOSE-HIGH ATTITUDE, SETTLED BACK ON THE SAFETY FENCE AND SLID BACKWARD INTO THE WATER.
Source: NTSB Aviation Accident Database
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