Glad it was only a back-up computer failure and you got back down alright. We had something similar happen here not too long ago where an Airbus took off with a failing engine bearing. The airport is close and I was outside listening to the squealing it made as it flew by. I watched it climb and circle back to land. I found out that the pilot dumped the fuel while circling back. I have a friend that works at the airport that filled me in with the details.
I really like your Grand Canyon shots!