I'm fairly sure the max wind speed for rotor engagement on the S-76s I flew (A, A++, B, C, C+, about 4,400 hours in total) wasn't as high as 60 kts.
It's well over ten years since I last flew the type but I think the manufacturer's limit was 40 kts. It would be a brave operator who disregarded that.
Edit: Just found my old SK-76 question bank, as issued by Flight Safety International. 40 kts was the rotor engagement wind speed limit.
Last edited by ShyTorque; 7th Mar 2018 at 20:16.
Reason: As above