As announced by U.S. EPA and Department of Justice, MTU America Inc (MTU), subsidiary of Rolls-Royce Power Systems AG, will implement auditing program to ensure proper emissions testing and compliance with federal emission standards for its heavy-duty, diesel, non-road engines as part of settlement to resolve alleged Clean Air Act violations. Complaint alleges MTU sold 895 non-road, heavy-duty diesel engines without valid certificates of conformity.