Mexican airline hot corrosion engine failure

[Tom shows turbine blades.] To show you some hot corrosion: these are some turbine blades. They came off a functioning Mexicali airline jet maintained by United Airlines. This is one that didn't corrode; this is one that did corrode, it was still in the — and if you look at it carefully, see, this one sort of warped, not quite straight anymore. This is sulfidation. We'll talk about that a little bit later.