New Orleans, Louisiana — Federal regulators have issued an urgent warning regarding safety concerns associated with the Boeing 737 MAX, specifically focusing on engine malfunctions that may lead to smoke infiltrating the cabin or cockpit. The National Transportation Safety Board (NTSB) highlighted that damage to the oil system of the aircraft’s engines could allow smoke from leaking oil to enter the ventilation system, posing serious hazards for flight crews and passengers alike.

The NTSB’s caution follows two alarming incidents involving Southwest Airlines flights. In both cases, CFM International LEAP-1B engines failed after encountering bird strikes, resulting in smoke entering the cabin. The severity of the situations necessitated emergency landings, but fortunately, no injuries occurred during either event.

During a December 2023 incident, the captain of a Boeing 737-8 reported struggling to see the instrument panel due to thick, acrid smoke shortly after takeoff from New Orleans. Similarly, another flight in March 2023 experienced similar engine damage, allowing fog to pour into the passenger area after departing from Havana, Cuba. These episodes raised significant alarms about the potential risks associated with the engines.

In response to these incidents, the NTSB is advocating for modifications to the Boeing 737 MAX engines, which are also utilized in other aircraft like the Airbus A32 series. The agency urgently requested the Federal Aviation Administration (FAA) to examine whether the LEAP-1A and LEAP-1C engines might face the same vulnerabilities as their LEAP-1B counterparts.

Moreover, the NTSB is concerned that flight crews may not be adequately informed about the risks of smoke intrusion or familiar with emergency protocols. To address this issue, they have urged the FAA to mandate that operators, including Boeing, inform their crews of the smoke hazard.

In light of these safety concerns, Boeing has proactively updated its flight manuals to provide clearer guidance for pilots on how to mitigate the risk of smoke entering the cockpit or cabin. Company representatives stated their commitment to addressing these issues, indicating they are collaborating with CFM International to implement a software design update recommended by the safety board.

Furthermore, GE Aerospace, the parent company of CFM International, affirmed its alignment with the NTSB’s recommendations and confirmed that work is already in progress to enhance the safety of the engine systems. As these developments unfold, both the aviation community and passengers will be closely monitoring the steps taken to ensure the safety and reliability of the Boeing 737 MAX fleet.