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The Bill Graham helicopter crash was an accident involving a Bell 206B that crashed into a transmission tower west of Vallejo, California, on 25 October 1991. All three people on board were killed including rock concert promoter Bill Graham The cause of the accident was determined to be the pilot's intentional flight into known adverse weather.〔 ==Accident== The Bell 206B JetRanger was operating under Federal Aviation Regulation Part 91,〔 and departed from parking lot "F" of the Concord Pavilion around 9:45 pm, bound for the Commodore Center Heliport (KJMC) in Sausalito, California approximately 27 miles to the southwest. The pilot had received a weather briefing in which Visual flight rules (VFR) flight was not recommended due to inclement weather. Before take-off the pilot requested and received a special VFR clearance to pass though the airspace of Buchanan Field Airport on a northwest heading.〔 When the helicopter lifted off the weather was one half mile visibility, gusty winds, heavy rain and overcast with a two hundred foot ceiling. Using Pilotage to navigate from one landmark to another at an altitude just below the cloud base, the helicopter pilot proceeded through the city of Vallejo and began following California State Route 37. At 9:56 pm near the northern most point of San Pablo Bay, the Bell 206B struck the top of a 223 foot high-voltage transmission tower, located approximately 150 feet south of Rt. 37 and became impaled on it.〔 The aircraft exploded on impact and all three occupants suffered fatal injuries. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Bill Graham helicopter crash」の詳細全文を読む スポンサード リンク
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