[_delirium]

That's definitely the case with deployed civilian aircraft systems, but I'd be surprised if there wasn't some unmanned system somewhere doing more complex reasoning. There was a talk years ago at IJCAI from some people from NASA Ames on a prototype aircraft-control system they'd built that used a reasoning system to assist with performing emergency landings in situations with no preprogrammed contingency, by taking into account some telemetry information (e.g. aircraft damage), map information, an aerodynamic model, and risk models.

I do believe they were planning to deploy it as a suggestion system though, which would suggest a course of action, and then leave it to the pilot to implement it or not. Then the judgment gets more murky; now the system is doing some of the judgment (evaluation of alternatives, etc.) that a human pilot would normally do, but leaving some of the judgment (accept the suggestion, modify it) still to the human.

edit: Here's a more recent paper than the one I'm thinking of, but must be the same project: http://ti.arc.nasa.gov/m/profile/de2smith/publications/IAAI0...