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WASHINGTON– According to Flight Global, Boeing remains uncertain about FAA will respond to its regulatory exemption request for the Stall Management Yaw Damper (SMYD) system on the 737 MAX 7 and MAX 10 aircraft.
The aerospace manufacturer submitted the exemption request for both models in January, stating that while the system has proven safe, it does not meet what Boeing described as “increased regulatory expectations.”
737_MAX_10_Roll_Out_(Nov_2019); photo- lamblukas; wikimedia commonsBoeing-FAA Regulatory Challenges
The FAA and Boeing have faced numerous obstacles in the certification process for the 737 Max 7 and Max 10 variants.
Following the two fatal crashes involving the 737 Max 8, regulators have implemented significantly stricter certification requirements, scrutinizing every system on the new variants.
Boeing has struggled to satisfy these enhanced standards, particularly regarding flight control software and systems integration.
“Nothing is concluded… Boeing continues to work with the FAA on the SMYD issue, utilizing “extensive analysis and research to determine the right path forward.”
Brian West, Chief Financial Officer, Boeing (stated regarding the SMYD exemption request on March 19)
If granted, the exemption would allow the Max 7 and Max 10 to receive FAA certification despite Boeing’s inability to demonstrate that the SMYDs comply with newer, more stringent regulatory requirements for software systems.
Boeing 737 MAX 8; Photo- BoeingBoeing 737 Max SMYD System
The SMYD systems in the Max 7 and Max 10 support new “enhanced” angle of attack safety features that Boeing plans to implement across all Max variants, including the already-certified Max 8 and Max 9 models. Consequently, certification delays for the Max 7 and Max 10 will also postpone the deployment of these AOA updates to existing models.
The enhancement provides aircraft with a “synthetic” AOA sensor to complement the current system, which utilizes two mechanical AOA sensors. Boeing developed these modifications in response to increased regulatory scrutiny following two fatal 737 Max crashes in 2018.
Industry Opposition
The Air Line Pilots Association (ALPA), International has formally requested that the FAA deny Boeing’s exemption application, arguing that approval would allow the SMYD to operate under less stringent reliability standards than normally required.
For Boeing, the certification of these aircraft holds critical importance. Both the 737 Max 7 and Max 10 variants have experienced years of delays, frustrating customers who have placed orders and causing Boeing to lose significant market share to its competitor Airbus.
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Boeing 737 MAX 7 and 10 to Certify by 2025
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