who for?
on who's behalf are you doing this work
Boeing?
Agustawestlands?
the MoD?
a bit more clarity may get you some responses, however a wild shot in the dark about a military aircraft safety device without any credibility as to the requirement for the info is not likely to get you any answers
You dont live any where near a location that would need to know that info and the manufacturers wouldnt need to ask on this site anyway
DM