The National Transportation Safety Board (NTSB) issued an urgent safety recommendation Wednesday to modify jet engines on Boeing’s 737 Max airplanes to prevent smoke from entering the cockpit or cabin in certain scenarios. The warning comes after two incidents involving Southwest Airlines planes equipped with CFM International LEAP-1B engines that experienced bird strikes in 2023.The NTSB said that these CFM engines have a safety feature, called a load reduction device, that can inadvertently damage the oil ...