I had to do a flight a ways back in a 2 axis auto pilot equipped plane with datalink weather and TIS and on a long leg with nothing to do I found myself reading the auto pilot manual looking something up and it was probably close to 5-10 minutes I bet before I looked up.

Kind of an eye opener when you realize that you develop a false sense of security on the equipment in the airplane. I preach every day to always keep your eyes outside the airplane and be scanning for traffic and here I was with my nose in the manual for nearly ten minutes..I was on a flight plan but that doesnt spot J-3 Cubs