SE IMC CAT is fantastic, re-invigorating aviation as competitve transport.
PC12 and Cessna caravan are fantasticaly economical and provide an excellent customer proposition.
The arguement for SE is even more powerful in helicopters than aeroplanes.
Target Zero is dangerous, target 1x10^-6 is realistic acceptable and stops people making daft rules in the (bogus) pursuit of 1^10-9.
The A109 (Fuel Starvation, Swash Plates, Tail Rotor Failures, Crane. EC135 LOC IMC, Fuel Starvation, S76 LOC IMC, AS355 T/rR fail (x2, one into a roof, LOC IMCx2), AW139 LOC IMC, Tail Boom etc highlight this. High barrier to entry suits some, but legislators should resist that motivation.
The report quoted shows that SE reliability DOES meet the standard required, so that the conclusion that they should be banned DOES NOT MAKE SENSE.
PROPORTIONATE REGULATION !?!?!
EASA.2012.OP.09 Study on single-engined helicopter operations