Just to return to the SLD restrictions on the S-92A. The S-92A is certified to the fullest extent of Appendix C in 14 CFR Part 29, taking the allowable 10,000 ft limitation for expediency - the system was clearly designed to be independant of altitude.
Appendix C does not cover SLD - in fact the FAA is hardover in their concern that ANY helicopter not be operated in that environment. The restriction in the RFM is to assuage their concerns about SLD - Roselawn was a very hard lesson for the FAA and the S-92A walked straight into the backlash.
The S-92A is
certainly no more susceptible to SLD than ANY helicopter out there.
