smjmitchell wrote:

3. I dunno if you know anything aboutthis but what is the normal approach
for the certification of a seat ... are they normally TSO'd, approved as
part of the type design (unlikely) or perhaps STC'd.

JTSO–C25a Aircraft Seats and Berths (Type 1 Transport 6 g Forward Load)
JTSO–C39b Aircraft Seats and Berths

--
Luca
http://www.geocities.com/lucaarnu/