What legislative changes followed the 737 MAX crashes regarding safety?

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Legislative Changes Mandated Enhanced Safety Measures for the 737 MAX Fleet

Following two fatal Boeing 737 MAX crashes in 2018 and 2019, federal legislation was enacted to introduce new safety requirements. These legislative changes were a direct response to findings from Capitol Hill hearings that identified weak government oversight of Boeing as a contributing factor to the accidents. Consequently, legislation passed in 2020 mandated specific upgrades to the entire fleet of over 2,300 MAX aircraft.
Mandated Installation of New Angle of Attack Sensors

The 2020 legislation specifically required Boeing to install new Angle of Attack (AOA) sensors on all 737 MAX planes. This directive was intended to address a critical safety deficiency identified in the investigations of the fatal crashes. The implementation of these new sensors was to be completed across the fleet within a two-year timeframe following the legislation's passage.
Enhanced Oversight Following Crash Investigations

The crashes in 2018 and 2019, which killed 346 people, led to extensive scrutiny of Boeing's design and certification processes. Capitol Hill hearings were instrumental in revealing systemic issues, including insufficient government oversight of the aircraft manufacturer. This heightened awareness of regulatory gaps directly influenced the subsequent legislative actions aimed at preventing future occurrences.
Focus on Addressing Anti-Stall System Design Flaws

A key element contributing to the fatal accidents was the flawed design of the Maneuvering Characteristics Augmentation System (MCAS), an anti-stall feature. This system activated improperly, hindering pilots' ability to maintain control of the aircraft. The legislative response, therefore, implicitly aimed to ensure that such critical safety systems were robust and subject to thorough review, leading to requirements like the AOA sensor upgrades.

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What legislative changes followed the 737 MAX crashes regarding safety?

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