ANFI, assuming you drive a car on a public road Iassume you have it insured. You pay this every year. Everyone does and yet very very few have accidents that involve claiming on the Insurance.
‘The second engine provides the same insurance against an unlikely event. You don’t then say because I have not had an engine failure I can do without it forever.
Having said that, and this you may not know, in certain operations we exploit the reliability of both engines, to operate AEO where an OEI event could be catastrophic. We call it PC2 With Exposure. To do it we have to prove reliability, monitor the engines with HUMs and crucially, operate the helicopter in accordance with procedures to minimise the exposure time.
Such operations are restricted to those that exist in the public interest like HEMS or HOFO.
The same rule applies to SEHs but no one has ever exploited it. You can but wonder why.
DB