rotorspeed
Something, anything that took the form of backing up the pilot's decision making with regard to the weather or aircraft serviceability would be sufficient. It doesn't have to be an SMS but they're usually pretty comprehensive. It has to make the captain's decision bulletproof and modern Safety Management Systems, if implemented properly, will contain words or phrases that do just that. We simply can't allow a situation to continue where a guy is in fear for his employment if he goes against the wishes of the big boss man. Helicopters are developing a notorious reputation with the public and it's only going to get worse if it is discovered that sensible aviation decisions are being overruled by fear of upsetting the owner and being shown the door.