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US Safety Board wants to warn Boeing 737 MAX engine owners about smoke entering the cockpit

The National Transportation Safety Board released an urgent safety recommendation on Wednesday regarding the possibility that smoke could enter the cockpit or cabin in Boeing 737 MAX aircraft equipped with CFM International LEAP-1B engine.

The NTSB recommended that the LEAP-1A/-1C engines be evaluated for the possibility of the same problem. This recommendation follows two incidents involving a Southwest Airlines Boeing 737 MAX aircraft in 2023. The NTSB is asking the Federal Aviation Administration (FAA) to make sure that flight crews are informed of aircraft equipped with affected engines.

Southwest has confirmed that it is reviewing all recommendations and mitigation procedures are in place. Southwest informed its flight crews of the effects of bird strikes after two incidents that occurred in 2023. They emphasized the importance of adhering to established safety procedures.

CFM LEAP engines can be found on Airbus A320neo variants and Boeing 737 MAX. CFM is the largest engine manufacturer in terms of units sold. It's owned by GE Aerospace, Safran, and Safran.

The FAA and Boeing both agreed with the NTSB's recommendations. They also alerted the operators that, following a bird strike, smoke could enter the cockpit after the Load Reduction Devices (LRDs) were activated in the engines.

The FAA stated that it advised operators to review their crew training and procedures to make sure they addressed this potential problem. When the engine manufacturer creates a permanent solution, we will demand that operators implement it in a reasonable timeframe.

Boeing, GE, and Airbus have not yet commented.

The NTSB requested that the European Union Aviation Safety Agency (EASA) and the Civil Aviation Administration of China determine whether other variants of CFM LEAP engines are also susceptible of causing smoke to appear in the cockpit or cabin when the LRD is activated.

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The FAA stated that it would not be necessary to require immediate

After two incidents involving bird strikes involving CFM LEAP-1B engines, the Boeing 737 MAX engine review board convened to address concerns.

The FAA was considering new takeoff procedures that would close airflow for one or both engines in order to reduce the impact of bird strikes and to prevent smoke from entering cockpits.

The NTSB will begin an investigation in 2024 into the Southwest left-engine bird strike near New Orleans and the subsequent smoke in cockpit incident that took place in December 2023.

Another incident took place on a Southwest flight departing Havana in March 2023, where a bird struck the cabin and caused smoke to fill it.

Boeing released a bulletin in February 2024 to alert flight crews about the potential effects of severe engine damage on flight deck and cabin. Reporting by David Shepardson, Editing by Chizu Gregorio and David Gregorio

(source: Reuters)