NTSB Identification: WPR14FA137
14 CFR Part 91: General Aviation
Accident occurred Tuesday, March 18, 2014 in Seattle, WA
Aircraft: EUROCOPTER AS 350 B2, registration: N250FB
Injuries: 2 Fatal,1 Serious.

This is preliminary information, subject to change, and may contain errors. Any errors in this report will be corrected when the final report has been completed. 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.

On March 18, 2014, about 0740 Pacific daylight time, a Eurocopter AS 350 B2, N250FB, was destroyed when it impacted terrain following takeoff from the KOMO TV Heliport (WN16), Seattle, Washington. The helicopter was registered to, and operated by Helicopters Inc., Cahokia, Illinois, under the provisions of Title 14 Code of Federal Regulations Part 91. The commercial pilot and one passenger were fatally injured and one person, located in a stationary vehicle, was seriously injured. Visual meteorological conditions prevailed and no flight plan was filed for the local repositioning flight that was originating at the time of the accident. The pilot's intended destination was the Renton Municipal Airport (RNT), Renton, Washington.

Multiple witnesses located adjacent to the accident site reported observing the helicopter lift off from the helipad and begin a counterclockwise rotation. The witnesses stated that the helicopter pitched downward, while continuing the counterclockwise rotation, and descended into an occupied vehicle and terrain near the intersection of 4th Avenue and Broad Street; postimpact fire ensued.

Preliminary review of three security camera recordings, provided by the Seattle Police Department, revealed that the helicopter initially landed at WN16. The videos depicted the helicopter stationary on the helipad for about 15 minutes prior to takeoff. Further review revealed during the takeoff sequence, the helicopter began rotating counterclockwise and ascending slightly in a near level attitude. The helicopter continued rotating counterclockwise for about 360 degrees of rotation before it pitched forward in a nose low attitude. The helicopter continued the counterclockwise rotation in a nose low attitude until it disappeared from the camera's field of view.

Examination of the accident site revealed that the helicopter came to rest on its right side, oriented on a magnetic heading of about 050 degrees. A vehicle located east of the main wreckage was fire damaged. Another vehicle, located immediately west of the main wreckage was oriented on a southerly heading and exhibited downward crushing of the roof and hatchback structure. All major structural components of the helicopter were located in the immediate area of the main wreckage. Wreckage debris was located within an approximate 340 foot radius to the main wreckage.

The wreckage was recovered to a secure location for further examination. Various components were retained by the National Transportation Safety Board (NTSB) investigator-in-charge for further examination.

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