"NL told in a post some time ago of Sikorsky giving their OK to operators, probably on a one off approval basis."
Is this a joke?
It must be. A 76A has enough trouble landing on one engine let alone taking off. Wind doesn’t help with planning because Sikorsky do not factor wind on their performance graphs.
Single engine recoveries I have known of or have done are the Belvedere, Wessex, Puma and Super Puma. At 30© zero wind the 332L1 can HOGE OEI with 2,000lbs fuel so there is no drama.
I know of one BHL 332 that had to shut down one engine to get to Bergen. Shutting down one or more engines for range was common on the Meteor, (one out of two), Nimrod, (two out of four) and B36, (six out of ten).