US safety investigators urge immediate action on Boeing 737 Max engine issues that could lead to smoke in the cockpit and cabin after bird strikes. The NTSB calls for the FAA to alert flight crews and revise safety procedures while work on a software update is underway.

The NTSB’s safety alert pertains to CFM International’s LEAP-1B engines, which are installed on Boeing 737 Max aircraft and certain Airbus A320neo variants. This malfunction may result in the release of hot oil fumes into the aircraft's ventilation system.