The investigation by the United States House of Representatives severely blames the planemaker and the Federal Aviation Administration (FAA) for their role in the crashes of two Boeing 737 MAX aircraft that led to the death of 346 people.

After 18 months of investigation, the Democratic majority of the House Transportation and Infrastructure Committee has published a 239-page final report detailing a “disturbing pattern of technical miscalculations and troubling management misjudgments made by Boeing” during the development of the 737 MAX, as well as oversight lapses from the FAA.

“Boeing failed in its design and development of the MAX, and the FAA failed in its oversight of Boeing and its certification of the aircraft,” the report states. “The MAX crashes were not the result of a singular failure, technical mistake, or mismanaged event. They were the horrific culmination of a series of faulty technical assumptions by Boeing’s engineers, a lack of transparency on the part of Boeing’s management, and grossly insufficient oversight by the FAA.”

The Committee report points at “faulty design and performance assumptions” made by Boeing, especially on the MCAS system. The fact that the system was acting on non-redundant sensors, its classification as a non-critical system and the assumption that pilots would be able to counteract a malfunction are criticized.

It condemns a “culture of concealment” from the manufacturer, specifically regarding the absence of Angle of Attack (AOA) Disagree alert on the delivered aircraft.

The safety of the Boeing 737 MAX was further undermined by pressure from the company’s management to keep the production on schedule to compete with Airbus’ new A320neo aircraft, and to avoid any unnecessary costs.

Those findings echo the report of the Inspector General of the Department of Transportation (DOT) published on June 29, 2020, which found out that Boeing deflected the attention of the FAA away from the MCAS system, and put “undue pressure” on its employees assigned to the certification of the aircraft.

The investigation by the United States House of Representatives severely blames the planemaker and the Federal Aviation Administration (FAA) for their role in the crashes of two Boeing 737 MAX aircraft that led to the death of 346 people.

After 18 months of investigation, the Democratic majority of the House Transportation and Infrastructure Committee has published a 239-page final report detailing a “disturbing pattern of technical miscalculations and troubling management misjudgments made by Boeing” during the development of the 737 MAX, as well as oversight lapses from the FAA.

“Boeing failed in its design and development of the MAX, and the FAA failed in its oversight of Boeing and its certification of the aircraft,” the report states. “The MAX crashes were not the result of a singular failure, technical mistake, or mismanaged event. They were the horrific culmination of a series of faulty technical assumptions by Boeing’s engineers, a lack of transparency on the part of Boeing’s management, and grossly insufficient oversight by the FAA.”

The Committee report points at “faulty design and performance assumptions” made by Boeing, especially on the MCAS system. The fact that the system was acting on non-redundant sensors, its classification as a non-critical system and the assumption that pilots would be able to counteract a malfunction are criticized.

It condemns a “culture of concealment” from the manufacturer, specifically regarding the absence of Angle of Attack (AOA) Disagree alert on the delivered aircraft.

The safety of the Boeing 737 MAX was further undermined by pressure from the company’s management to keep the production on schedule to compete with Airbus’ new A320neo aircraft, and to avoid any unnecessary costs.

Those findings echo the report of the Inspector General of the Department of Transportation (DOT) published on June 29, 2020, which found out that Boeing deflected the attention of the FAA away from the MCAS system, and put “undue pressure” on its employees assigned to the certification of the aircraft.

source: Aerotime