Originally Posted by
FlyingStone
It actually doesn't. It's got better instruments to fly in nice weather and it's fairly trivial to land any light aircraft without any instruments when you've got a bit of experience, so no need for any serious redundancy. Also, if one instrument doesn't work, you always have a chance at postponing your flying for a day or two, whereas airlines would go bankrupt without a solid MEL dispatch availability. Horses for courses.
I get the point about redundancy but my sailplane has multiple redundant inertial/nav systems running off independent power supplies and a certified EFIS with backup. I fly IMC quite a bit and could go IFR if I wanted to.
I think the question was not so much about the despatch reliability and ultimate redundancy of an avionics fit, it was about what it could do when it was working and the answer to that is GA instrumentation will always be ahead of airliner kit because GA manufacturers can use the latest tech...