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Richard Kaplan wrote:


Look at the space shuttle for a comparable example; even NASA is
starting to
have difficulty obtaining parts for the 1970s era computers on the space
shuttle.


Well....there were only 5 shuttles built, and for a very limited purpose.
Even
then, they did do a major upgrade on the "avionics" several years ago.

A better model is the Boeing 767. It was the first glass cockpit aircraft
that
Boeing sent out the door. The early ships are now 23 years old. They
don't
have GPS sensing and they have very limited database memory and slow
processor
speed. But, the owners of those early birds have been provided the option
to
upgrade the weaker components of the system without gutting the system.

Hopefully, the same will happen with Cessna, et al.

The AS9100 squeeze is on and you will find many less options to come.