4.3 Accident Rate by Departures
There is a growing trend for organizations reporting safety data to do so using accident rates per number of departures given that safety exposure is greatest during departure and arrival. Accidents of aircraft en-route are rare except for flights in low level flight in marginal visual con-ditions. Accident rates per departure, or flight segment or cycle, therefore provide more realis-tic safety correlations.
Ed note:
Additional information is provided at Appendix C. The profiling for the above three categories has changed significantly from that in all Safety Briefs
prior to Issue 7. Consequently the data presented in the tables which follow cannot be directly compared with that in the same tables in previous
edition of the Safety Brief, and vice versa.
The accident rate per 100,000 departures is as follows:
Business Jet Accident and Rate by Departures (per 100,000 departures)
Accident Rate Departures Accidents (5 Years) Accident Rate
Total Fatal Total Fatal
Large Jet Aircraft 4,965,491 33 5 0.66 0.10
Medium Jet Aircraft 5,623,724 51 12 0.91 0.21
Light Business Jets 8,785,105 90 22 1.02 0.21
*All Business Jets 19,074,320 174 39 0.91 0.20
Table 4.3a
Bu siness Turbo Prop Accidents and Rates by Departures (per 100,000 departures)
Departures Accidents (5 Years) Accident Rate
Total Fatal Total Fatal
Large Turbo Prop 1,001,812 69 21 6.89 2.10
Medium Turbo Prop 13,228,045 280 87 2.12 0.66
Light Turbo Prop 811,630 35 10 4.31 1.23
All Turbo Prop 15,041,487 384 118 2.55 0.78
Table 4.3b Table 4.3c
Al l Business Turbine Accidents and Rates by Departures (per 100,000 departures)
Departures Accidents (5 Years) Accident Rate
Total Fatal Total Fatal
All Business Aircraft 34,115,807 558 157 1.64 0.46
If an assumption is made that the distribution of departures for operator types of commercial (30.4%), corporate (55.3%) and owner-operated (14.3%) is relatively the same as the distribu-tion between flight hours, the accident rates by type of operation can be calculated as follows:
Busin ess Aircraft Ac cident Rates by Operator Type (per 100,000 departures) (Extrapolated)
Operator Type Departures (5 yrs) Total Accidents Fatal Accidents Total Accident Rate Fatal Accident Rate
Commercial (Air Taxi) 10,371,205 305 85 2.94 0.82
Corporate 18,866,041 75 13 0.40 0.07
Owner-operated 4,878,560 123 41 2.52 0.84
*All Business Aircraft 34,115,807 558 157 1.64 0.46
Table 4.3d Table 4.3e
Business Aircraft Accident Rates by Operator Type (Extrapolated) (per 100,000 departures) Jet Aircraft
Operator Type Departures (5 yrs) Total Accidents Fatal Accidents Total Accident Rate Fatal Accident Rate
Commercial (Air Taxi) 5,798,593 91 23 1.57 0.40
Corporate 10,548,098 45 5 0.43 0.05
Owner-Operated 2,727,628 18 4 0.66 0.15
*All Business Aircraft 19,074,320 179 39 0.94 0.20
Business Aircraft Accident Rates by Operator Type (Extrapolated) (per 100,000 departures) Turbo Prop Aircraft 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：Business Aviation Safety Brief(5)
