FILE - A worker wearing a mask walks past a Boeing 737 Max 9 as it is prepared for a flight from Renton Municipal Airport, Nov. 18, 2020, in Renton, Wash. (AP Photo/Ted S. Warren, File) Safety experts ...

A well-running and adequately maintained diesel engine should produce no visible smoke from the tailpipe. Modern diesel engines equipped with common-rail direct-injection technology have unlocked more ...

Safety experts recommend that the engines on Boeing’s troubled 737 Max airplanes and some Airbus models be modified quickly to prevent smoke from filling the cockpit or cabin after a safety feature is ...

Safety experts recommended Wednesday that the engines on Boeing’s troubled 737 Max airplanes be modified quickly to prevent smoke from filling the cockpit or cabin after a safety feature is activated ...