Turbine business airplanes experienced a major increase in accidents last year, compared with 2010. According to statistics compiled by AIN, nonfatal accidents involving U.S.-registered business jets nearly doubled from 16 in 2010 to 31 last year, while U.S.-registered turboprop accidents surged from 32 to 43 year-over-year. In the one fatal jet accident recorded last year, all four crewmembers were killed in the April 2 crash of a Gulfstream G650, which was on a certification test flight; two people had died in the single fatal accident of a business jet in 2010. There have been no fatal Part 135 jet accidents over the last two years. Meanwhile, the number of fatalities in turboprop accidents more than doubled–29 people were killed in 11 accidents last year, versus 12 people killed in four accidents in 2010. Last year, five accidents involving non-U.S.-registered jets on private, charter and government missions killed 68 people (including 44 aboard one charter flight), compared with four accidents and 14 fatalities in 2010. Similar missions by non-U.S.-registered turboprops caused the deaths of 55 people last year, down slightly from 59 in 2010.