The aircraft most notoriously associated with a series of fatal crashes in recent history is the Boeing 737 MAX. The plane was grounded worldwide for 20 months following two tragic accidents: Lion Air Flight 610 in October 2018 and Ethiopian Airlines Flight 302 in March 2019, which together claimed 346 lives. Both crashes were linked to a flawed flight control system called MCAS (Maneuvering Characteristics Augmentation System), which repeatedly pushed the plane's nose down based on faulty sensor data. In 2026, the 737 MAX is back in service globally after extensive software redesigns and pilot retraining mandated by the FAA and other regulators. However, the model faced renewed scrutiny in early 2024 after a "door plug" blew out mid-flight on an Alaska Airlines jet. While it is now statistically considered a safe and highly scrutinized aircraft, its history of high-profile technical failures has made it a symbol of the immense challenges in modern aerospace engineering and safety oversight.