NTSB Identification: SEA84LA083.
The docket is stored on NTSB microfiche number 23955.
Accident occurred Saturday, April 14, 1984 in KENT, WA
Aircraft: HUGHES 369D, registration: N1092L
Injuries: 1 Minor.

NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

THE PLT REQUESTED CLEARANCE TO TRANSIT THE SEATTLE TCA FOR A LANDING AT BOEING FIELD. HE WAS ADVISED OF A DC-10 DEPARTING THE SEATTLE-TACOMA INTL ARPT & WAS CAUTIONED ABOUT POSSIBLE WAKE TURBULENCE. THE DC-10 PASSED THE HELICOPTER WITH ABOUT 1 1/2 MI LATERAL SEPARATION & WAS ABOUT 600 FT HIGHER THAN THE HELICOPTER. SHORTLY AFTER THAT, THE HELICOPTER ENCOUNTERED VIOLENT VORTEX TURBULENCE. IT EXCEEDED 90 DEG OF BANK & 90 DEG OF NOSE DOWN ATTITUDE, AT WHICH TIME, THE ENG FLAMED OUT. THE TURBULENCE CONTINUED THRU-OUT THE ENSUING AUTOROTATION, BUT DIMINISHED DURING THE LAST 100 TO 200 FT. THE PLT TRIED TO FLARE FOR A LANDING, BUT THE MAIN ROTOR BLADES FLEXED DOWNWIND & CONTACTED THE TAIL BOOM. DURING RECOVERY, LESS THAN 1 QT OF FUEL WAS FOUND IN THE HELICOPTER.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

PLANNING/DECISION..IMPROPER..PILOT IN COMMAND


Contributing Factors

FLUID,FUEL..STARVATION



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