The National Transportation Safety Board of the United States warns of a potential crisis with the jet engines of Boeing 737 MAX aircraft.

The National Transportation Safety Board in the United States has issued a rare emergency safety alert, warning of potential issues with the jet engines of Boeing 737 MAX aircraft. This recommendation comes after two Southwest Airlines flights experienced bird strikes. The National Transportation Safety Board found that there are issues with the LEAP-1B engines by CFM International, which could result in smoke entering the ventilation system and eventually entering the cockpit or cabin when the engine is damaged. Smoke in the cockpit is classified as an extremely dangerous situation in the aviation industry, as it could incapacitate the pilots. The National Transportation Safety Board expressed concern that the flight crews operating these aircraft may not be fully aware of the potential dangers, and called on the Federal Aviation Administration to ensure that operators inform the flight crews of aircraft equipped with the affected engines. The board also recommended modifications to the engine software. The National Transportation Safety Board noted that Boeing has revised the pilot's flight manual to detail steps to prevent smoke from entering the cockpit or cabin in the event of such damage. Boeing stated in a release that "CFM International and Boeing have been working on software design updates. We support the recommendations of the National Transportation Safety Board."