"Richard Kaplan" wrote in
news:1110257401.d3fd2076e1b352748b3e4e1081056f91@t eranews:

Yes, I did it and it is still permissible.

See FAR 135.163 redundant alternator/gyro requirements. There is
also an FAR requiring a 3-axis autopilot if the operations will be
single-pilot and requiring an approved engine trend-monitoring program
for single-engine aircraft. I did all this and had single-pilot,
single-engine piston, IFR night/day known-icing approval.

You're right, I was thinking of 10 or more pax, for some reason.

--
Regards,

Stan

"They that can give up essential liberty to obtain a little temporary
safety deserve neither liberty nor safety." B. Franklin