(March 6, 2017, 8:35 AM EST) -- CHICAGO — A federal judge in Illinois on March 1 found that Navistar Inc. and Navistar Financial Corp. are liable for violating the Clean Air Act (CAA) by selling 7,749 engines in 2010 without certificates of compliance, finding that the engines were not subject to a certificate issued to the companies in 2009 because they were not saleable (United States of America v. Navistar, Inc., et al., 15 CV 6143, N.D. Ill., 2017 U.S. Dist. LEXIS 28600)....