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- The Boeing 737 MAX was grounded worldwide in March 2019 following two fatal crashes, and after nearly two years of scrutiny, software updates, and pilot training revisions, it...
- The grounding of the Boeing 737 MAX began on March 13, 2019, after the crash of Ethiopian Airlines Flight 302, which followed the crash of Lion Air Flight...
- The MCAS system relied on input from a single angle of attack (AOA) sensor, and in both crashes, faulty AOA sensor readings triggered the system to repeatedly push...
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The Boeing 737 MAX was grounded worldwide in March 2019 following two fatal crashes, and after nearly two years of scrutiny, software updates, and pilot training revisions, it was recertified to fly by the Federal Aviation Administration (FAA) in November 2020. As of January 10, 2026, the 737 MAX is operating commercially, though lingering concerns and ongoing investigations continue to shape its reputation and future.
The Boeing 737 MAX Grounding
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The grounding of the Boeing 737 MAX began on March 13, 2019, after the crash of Ethiopian Airlines Flight 302, which followed the crash of Lion Air Flight 610 in October 2018. Both crashes involved the activation of the Maneuvering Characteristics Augmentation System (MCAS), a software feature designed to prevent stalls.
The MCAS system relied on input from a single angle of attack (AOA) sensor, and in both crashes, faulty AOA sensor readings triggered the system to repeatedly push the aircraft’s nose down, ultimately leading to loss of control. Investigations revealed that pilots were often unaware of MCAS and lacked adequate training to respond to its activation.
Example: The final report of the Joint Investigators Team (JIT) for the Lion Air Flight 610 crash, released in July 2019, detailed the sequence of events leading to the accident and highlighted the role of MCAS. Lion Air Flight 610 Final Report
Recertification and Return to Service
The FAA initiated a comprehensive review of the 737 MAX’s flight control system and software. Boeing developed software updates to address the MCAS issues, including making it less powerful and relying on input from two AOA sensors. The updates also aimed to provide pilots with more information about the system’s operation.
Detail: The recertification process involved extensive simulator testing, engineering reviews, and pilot training. The FAA issued a revised Airworthiness Directive in November 2020, outlining the required software updates, pilot training, and maintenance procedures for the 737 MAX to return to service. FAA airworthiness Directive 2020-23-02
Example: On November 18, 2020, the FAA announced the ungrounding of the Boeing 737 MAX, stating that the agency had “made necessary safety upgrades to the Boeing 737 MAX, and has issued a new Airworthiness Directive.” FAA Press Release – 737 MAX Return to Service
Legal and Financial Consequences
The crashes and subsequent grounding resulted in significant legal and financial repercussions for Boeing. The department of Justice (DOJ) conducted a criminal inquiry into the growth and certification of the 737 MAX.
Detail: In January 2021, Boeing reached a deferred prosecution agreement with the DOJ, agreeing to pay a $2.5 billion penalty to resolve criminal charges related to conspiracy to defraud the FAA. The agreement required Boeing to implement improvements to its safety compliance programs. DOJ Deferred Prosecution Agreement with Boeing
Example: Boeing also faced numerous civil lawsuits from families of the victims. As of December 2023, Boeing had settled the vast majority of these lawsuits, with total payouts exceeding $2.5 billion. Reuters – Boeing Settles 737 MAX Lawsuits
Current Status (as of January 10, 2026)
As of January 10, 2026, the Boeing 737 MAX is back in commercial service with most major airlines worldwide. However, scrutiny of Boeing’s safety culture and manufacturing processes remains high, particularly following a January 5, 2024 incident involving a door plug blowout on alaska Airlines Flight 1282.
Detail: The FAA has launched a new audit of Boeing’s production lines and quality control systems in response to the Alaska Airlines incident. The National Transportation Safety Board (NTSB) is investigating the cause of the door plug failure.