@gulliBell
An action taken that is not by the book but which saves the aircraft is a better outcome than a crew following a checklist perfectly all the way to the scene of the accident
I fully agree about this with you but if the crew has the knowledge that the Emergency Check list has an item if helicopter will suddenly become unflyable without any cautions and warnings. The crew should memorize by heart that
"SWITCH OF HYD1" and is doesn't make recovery
"TRY TO SWITCH OFF HYD2" in a situation where the helicopter caution system is not capable to announce any caution or warnings.
My point is that
this should be in the RFM,
Emergency check lists and have to be just one of the emergency events that will be trained regularly by the full motion sim recurrent session for all the S76 pilots.