Si, I believe your description of CDFA is not quite right. You describe a notional glide path approach. With CDFA there is no MDA, its a DA so no level sector and you go around on reaching DA ( if not visual). Someone who has actually done these will correct me if I'm wrong!
The technology for flying this as an overlay approach ( ie controlled by the FMS in vertical profile ) has been around for a while but currently, the EC225 doesn't do it, although I believe it may be on the list for future development (EC take note!). Not sure if the S92 does it in a way acceptable to the CAA?
Last edited by HeliComparator; 31st Aug 2013 at 10:21.