1986 British International Helicopters Chinook crash the Chinook was too big for the offshore support task and the remaining Chinooks were withdrawn and sold. All surviving aircraft now operate with Columbia Helicopters in heavy lift, non-passenger capabilities. 1986 British International Helicopters Chinook crash On 6 November 1986, a Boeing 234LR Chinook helicopter returning workers from the Brent oilfield crashed on approach to land at Sumburgh Airport in the Shetland Islands. At from the runway the helicopter had a catastrophic forward transmission failure which de-synchronised the tandem rotors, causing the blades to collide. The helicopter crashed into the sea and sank. 43 passengers and two crew members
San Francisco and Oakland Helicopter Airlines flights being operated with Bell 206 helicopters. The following destinations were served at various times by San Francisco and Oakland Helicopter Airlines during its existence: San Francisco and Oakland Helicopter Airlines San Francisco and Oakland Helicopter Airlines (also known as SFO Helicopter Airlines and SFO Helicopter) was a helicopter airline service offering scheduled passenger flights between San Francisco, Oakland, and other Bay Area cities. It was founded in 1961 but disappeared from the Official Airline Guide 15 years later before finally going out of business in 1986. San Francisco and Oakland Helicopter Airlines was one of the first helicopter airlines