Hi Nigel
Thanx for your input. It echoes most of the answers I receive on this topic.
Any twin has a certain capacity with 1 engine out. From the flight manual you can calculate what your weight should be to achieve single engine performance. This then becomes the weight you use from that helipad to give full engine out capability.
Later in your post you state when you required full Cat A capability, Sikorsky came up with profiles and weights that you stuck to.
Why would you not have consulted the flight manual as you recommended above.
To my knowledge there is no provision within the rotorcraft flight manual to operate a S76A to or from a helipad Cat A. I am not familiar with the A++.
As the restriction states "when operated in accordance with the aircraft flight manual".
Cheers