Which Boeing Max Planes Crashed
The two fatal crashes involved Boeing 737 MAX 8 aircraft operated by Lion Air and Ethiopian Airlines. The Lion Air crash occurred in late October 2018 shortly after takeoff from Jakarta, Indonesia, killing all 189 people on board. The Ethiopian Airlines crash happened in March 2019, also shortly after departure from Addis Ababa, killing all 155 passengers and crew. Both incidents shared similar flight control issues linked to the Maneuvering Characteristics Augmentation System, or MCAS. The crashes led to a global grounding of the entire 737 MAX fleet worldwide. For background on the aircraft type, see the overview at Forbes.
In total, two Boeing 737 MAX 8 aircraft were involved in fatal accidents that resulted in 346 deaths. The Lion Air Flight 610 crash was the first fatal accident for the new MAX variant, and the Ethiopian Airlines crash was the second. Both crashes occurred within five months of each other and led to the worldwide suspension of 737 MAX flights. The incidents prompted investigations by aviation authorities in Indonesia, Ethiopia, the United States, and other countries. The crashes fundamentally changed the regulatory approach to new aircraft certification and pilot training requirements.
Why the Boeing Max Crashes Happened
The primary technical cause in both crashes was the MCAS software, which could repeatedly push the aircraft nose down based on a single sensor input. In the Lion Air crash, the angle-of-attack sensor had been misconfigured before the flight, giving the system false data. Pilots struggled to counter the repeated nose-down commands without a clear understanding of the system. The Ethiopian Airlines crash showed similar MCAS activation, with the crew using the same manual trim procedures but unable to stop the dive. The design reliance on a single sensor and inadequate pilot notification were central factors.
Boeing and the Federal Aviation Administration faced scrutiny over the certification process for the 737 MAX. The FAA delegated significant parts of the certification to Boeing itself, a practice that drew criticism after the crashes. Pilots in both cases were not initially trained on MCAS, and the system was not prominently documented in flight manuals. The crashes exposed gaps in the safety assessment of new flight control software on commercial aircraft. A detailed timeline of the regulatory response is available at the official FAA page FAA.
Aftermath and Current Status of the Boeing Max
Following the crashes, aviation authorities around the world grounded the 737 MAX fleet starting in March 2019. The grounding lasted more than 20 months, making it one of the longest in commercial aviation history. Boeing implemented software updates to MCAS, added redundant sensors, and revised pilot training requirements. The aircraft received recertification from the FAA and other regulators before returning to service in late 2020. Airlines that operated the MAX during the grounding faced significant financial and operational challenges.
The crashes had a major impact on Boeing's reputation, orders, and stock performance. Competitors such as Airbus gained market share while the MAX was grounded. The company faced multiple lawsuits from families of crash victims and from airlines. Regulatory reforms introduced new oversight mechanisms for aircraft certification processes. As of the latest public data, the 737 MAX remains in service with updated software and training protocols, though the incidents continue to influence aviation safety discussions. For financial analysis of the aftermath, see coverage at