Prawirogo Pangestu Stake in BREN Changes: ACES In, Out
- The Boeing 737 MAX, grounded worldwide in March 2019 following two fatal crashes, has undergone extensive revisions and received recertification from aviation authorities.
- The Boeing 737 MAX was grounded globally on March 13, 2019, after two crashes - Lion Air Flight 610 on October 29, 2018, and Ethiopian Airlines flight 302...
- MCAS was designed to automatically push the nose of the aircraft down to prevent stalls, but it relied on input from a single angle-of-attack sensor.
The Boeing 737 MAX, grounded worldwide in March 2019 following two fatal crashes, has undergone extensive revisions and received recertification from aviation authorities. As of January 26, 2026, the 737 MAX is operating commercially, though scrutiny and ongoing monitoring continue.
The Boeing 737 MAX Grounding
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The Boeing 737 MAX was grounded globally on March 13, 2019, after two crashes – Lion Air Flight 610 on October 29, 2018, and Ethiopian Airlines flight 302 on March 10, 2019 – killed a total of 346 people. Investigations revealed a common link: a faulty Maneuvering Characteristics Augmentation System (MCAS).
MCAS was designed to automatically push the nose of the aircraft down to prevent stalls, but it relied on input from a single angle-of-attack sensor. When the sensor failed, MCAS could erroneously activate, forcing the plane into a dive. Pilots were frequently enough unaware of the system’s activation and struggled to regain control.
Evidence: The final report of the Joint Investigators Team (JIT) examining the ethiopian Airlines crash, released in July 2019, explicitly cited the MCAS design flaws as a contributing factor. Ethiopian Airlines Press Release on JIT Report
Recertification and Software Updates
Boeing spent nearly two years developing software updates to address the MCAS issues. These updates included making MCAS rely on two angle-of-attack sensors, limiting its authority, and providing pilots with more data about its operation.
The Federal Aviation Administration (FAA) conducted a comprehensive review of the software and Boeing’s safety assessment processes. This review included simulator testing, engineering analysis, and pilot training evaluations. Other international aviation authorities, including the European Union Aviation Safety Agency (EASA), also conducted autonomous reviews.
Detail: The FAA issued a final rule lifting the grounding order on November 18,2020,after determining that Boeing had addressed the safety concerns. FAA Final Rule – Airworthiness Directive. However, the FAA mandated specific pilot training requirements before airlines could resume 737 MAX flights.
Ongoing Scrutiny and Recent Developments (as of january 26, 2026)
As of January 26, 2026, the Boeing 737 MAX is back in commercial service worldwide. However, the aircraft continues to be subject to increased scrutiny from regulators and the public. The national Transportation Safety Board (NTSB) continues to monitor the performance of the 737 MAX and investigate any reported incidents.
Recent developments include ongoing investigations into manufacturing quality control issues discovered in 2024, specifically concerning improperly drilled holes in the fuselage. Boeing has implemented corrective actions and is working with the FAA to ensure compliance. No new grounding orders have been issued as of this date.
Example: In December 2025, the FAA announced it was increasing oversight of Boeing’s manufacturing processes, including more frequent inspections and a review of Boeing’s quality control system. FAA Statement on Increased Boeing Oversight. This followed a series of reports detailing quality control lapses.
- Boeing: The aircraft manufacturer responsible for the 737 MAX.
- Federal Aviation Administration (FAA): The U.S. agency responsible for regulating aviation safety.
- European Union Aviation Safety Agency (EASA): The European agency responsible for regulating aviation safety.
- national Transportation safety board (NTSB): The U.S. agency responsible for investigating transportation accidents.
- Lion Air & ethiopian Airlines: the airlines involved in the fatal crashes.