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Propulsion Type
Figure 19 shows the distribution of accidents per propulsion type. The vast majority of accidents (87%) involved
helicopters that were powered by turboshaft engines. The majority of helicopters performing CAT operations are
powered by this type of powerplant.
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Figure 19:
CAT helicopter number of accidents 2005–2014 per propulsion type
%
%
Reciprocating
Turboshaft
Mass Group
Figure 20 shows the distribution of accidents per mass group. Half of all accidents (50%) involved helicopters
within the 2251-5700 kg mass group. This is to be expected as most CAT helicopter operations are performed by
helicopters within this mass group.
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Figure 20:
CAT helicopter number of accidents 2005-2014 per mass group
%
%
%
%
0-2 250 kg
5 701 to 27 000 kg
27 001 to 272 000 kg
2 251 to 5 700 kg