Thomas Coupling wrote -
"Secondly - IF the helicopter you fly, cannot hover on one engine whilst winching , the authorities say you cannot do it. IF you fly Pumas or Lynx, the chances are you're mil, therefore you are not subject to the same rules!
There are NO civilian light twins in the UK that can hover SSE whilst winching (except maybe the 109S) Certainly you could make a 902 or 135 hover SSE but you'd have to strip it out and it wouldnt be godd for man nor beast then would it??"
The problem isn't that you can't winch from these aircraft - Jar Ops 3 allows alleviation from the Perf A requirements when hoisting at a HEMS operating site - but that you can't use these exemptions for training flights.
So, if somebody went and stripped out a 902 / 135 and did the training on that, there is no reason why they then couldn't hoist for real at a HEMS job. Maybe a role for East Mids "spare" 902??
Or maybe somebody could build a simulator rig - does it say anywhere that the training has to be done in an actual aircraft?
As to why an AA would want to do it..well I think we all know that the Mil are happy to help out with winching - if they are available - which is not always the case.