Hmm 2F1B I guess what you're saying is those 350's flying around in the Alps and elsewhere, like in the jungle doing seismic, like in the Arctic, Antarctic, lifting over forests and GOM should all be banned. Do you have shares in a company selling twins? Oh and that's only a twin engine not a twin gearbox, tail rotor or main rotor head. Let's have a look at the stats over the last couple of years. How many crashes were due to engine failure? I know of 2 109's sadly that crashed into something solid with both engines running a Super Puma that parted company with its rotor head and Robinsons that got into cloud and lost control. Mate I'm about risk management but this whole twin thing does make me wonder. Isn't the Bell 206 the safest aircraft in the world by hours v incidents or did I read that wrong?