Can pilots share their experience with certification
of an experimental airplane with a Chelton EFIS-SV
system?

I have heard it said that the EFIS-SV system is not
IFR-approved and thus separate IFR-approved avionics
must be installed and operational to fly an approach
with an EFIS-SV system.  Chelton's literature in fact
refers to this and quotes 91.205 -- but 91.205 refers
to standard airworthiness category airplanes.

91.319 says no experimental airplane may be flown IFR
without approval from the Administrator.  Does that
not give the Administrator discretion to approve an
EFIS-SV for IFR navigation?  Why is approval of an
EFIS-SV for IFR navigation any different than approval
of an airplane that is equipped with a non-TSO'd
attitude indicator?

It seems to me that since the operating logic of the
EFIS-SV is so different than most other IFR GPS units,
it would be a distraction to have the requirement to
program IFR approaches both on the EFIS-SV system and
on another GPS.




Richard Kaplan
rkaplan@flyimc.com
www.flyimc.com