NTSB Identification: LAX86FJA02.
The docket is stored on NTSB microfiche number 31379.
Accident occurred Monday, July 07, 1986 in PACIFIC OCEAN
Probable Cause Approval Date: 03/27/1989
Aircraft: BELL 206B, registration: N4835A
Injuries: 1 Fatal,1 Serious.
NTSB investigators either traveled in support of this investigation or conducted a significant amount of investigative work without any travel, and used data obtained from various sources to prepare this aircraft accident report.
THE PLT WAS ATTEMPTING TO TAKE OFF FROM THE DECK OF A TUNA BOAT WHEN IT CONTACTED THE SIDE OF THE BOAT AND SANK IN THE OCEAN. POST ACCIDENT INSPECTION REVEALED ONE OF TWO NOSE TIEDOWN STRAPS HAD NOT BEEN REMOVED FROM THE HELICOPTER PRIOR TO THE TAKEOFF. THE NOSE TIEDOWN WERE NORMALLY USED ONLY AFTER FLYING HOURS AND WHEN ROUGH SEAS EXISTED. THE FOUR SIDE TIEDOWN STRAPS NORMALLY USED WHEN THE HELICOPTER WAS ON DECK WERE RELEASED BY A MECHANIC JUST PRIOR TO THE TAKEOFF. THE ACCIDENT OCCURRED IN THE PACIFIC OCEAN AT COORDINATES 10.15'N AND 141.40'W, APPROXIMATELY 91 MILES SE OF HILO, HAWAII.
The National Transportation Safety Board determines the probable cause(s) of this accident to be:TIE DOWN..INADVERTENT USE
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