Doug wrote:
The key is REDUNDANCY. Lets say computer one has a probability of
breaking of .01 (1 out of 100). Computer B has a probability of
breaking of .01. If their probabilities of breaking are independent of
each other then the probability of BOTH breaking is .0001 (1 in
10,000).

Perhaps each G1000 install should be accompanied by a totally seperate
GPS/Com, much like it has totally seperate AI, airspeed and altimeter.

It does. There are two GPS units, with two antenna. The antenna are
located in the base of the comm antennas. (some students get confused
by the GPS antenna behind those, but its just for XM weather).

Before take off part of the take off checklist is to go to the aux page
and see the signal strength for both GPS units. I've had the GPS fail
in flight and only noticed a "ALERT" pop up, but no change in service.

-Robert, G1000 CFII