Business jets were involved in 18 non-fatal accidents and three fatal accidents during the first nine months of this year, compared with 16 non-fatal accidents and one fatal accident in the same period last year, according to safety analyst Robert E. Breiling Associates of Boca Raton, Fla. Although the number of fatal accidents tripled, the number of people killed remained level at eight for both periods. Two people were killed in one accident involving a chartered business jet versus no fatal accidents involving chartered jets in the nine-month period last year. There were two non-fatal accidents involving fractional jets versus one period-over-period. In the first three quarters of this year, fatal accidents involving business turboprops increased to 13 from 10 last year, but fatalities decreased to 24 this year from 32 last year. Corporate operations of propjets were involved in two fatal accidents in the first three quarters of this year, compared with no fatal accidents in the same period last year.