Looks like contamination was not an issue for this incident. The article states there was a "mag problem" and the airplane did not get above 500 agl.
https://www.aopa.org/news-and-media...fMNSiCOWA2OVbjarZntwCAJ95dCwdZiPMwZJUT92bQ8GA
https://www.aopa.org/news-and-media...fMNSiCOWA2OVbjarZntwCAJ95dCwdZiPMwZJUT92bQ8GA