Figure 1

LTE accidents scorecard (2005–2015). Each panel presents a different aspect of these accidents (n = 71). (a) The number of LTE accidents by helicopter model. We have bundled the same helicopter models that have changed names or ownership, for example, Hughes 269 and Schweizer 269 are listed under “Hughes 269”. Similarly, the Hiller UH12 and the Hiller OH23 are listed under “Hiller UH12”. The two OH58 accidents are included here because they were flying under “public aircraft” (not military) for a police department and a Texas parks and wildlife department. The Hughes 369 is bundled with the OH-6 and MD500. (b) The phase of flight during which the LTE accident occurred. (c) The number of main rotor blades of the helicopters that experienced LTE accidents. (d) The type of engine of the helicopters that experienced LTE accidents. (e) The percent of LTE accidents that resulted in a given type of injury (only the most severe injury is counted in each accident, for example an accident that resulted in one fatality and one minor injury is only counted as a fatal LTE accident). (f) Cumulative LTE accident over 2005–2015. (g) Locations of LTE accidents in the U.S. over 2005–2015¹⁵.