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The Boeing 737 MAX was initially certified … The Boeing 737 MAX was initially certified in 2017 by the U.S. Federal Aviation Administration (FAA) and the European Union Aviation Safety Agency (EASA). Global regulators grounded the plane in 2019 following fatal crashes of Lion Air Flight 610 and Ethiopian Airlines Flight 302. Both crashes were linked to the Maneuvering Characteristics Augmentation System (MCAS), a new automatic flight control feature.Investigations in both crashes determined that Boeing and the FAA favored cost-saving solutions, but ultimately produced a flawed design of the MCAS instead. The FAA's Organization Designation Authorization program, allowing manufacturers to act on its behalf, was also questioned for weakening its oversight of Boeing. Boeing wanted the FAA to certify the airplane as another version of the long-established 737; this would limit the need for additional training of pilots, a major cost saving for airline customers. During flight tests, however, Boeing discovered that the position and larger size of the engines tended to push up the airplane nose during certain maneuvers. To counter that tendency and ensure fleet commonality with the 737 family, Boeing added MCAS so the MAX would handle similar to earlier 737 versions. Boeing convinced the FAA that MCAS could not fail hazardously or catastrophically, and that existing procedures were effective in dealing with malfunctions. The MAX was exempted from certain newer safety requirements, saving Boeing billions of dollars in development costs. In February 2020, the US Justice Department (DOJ) investigated Boeing's hiding of information from the FAA, based on the content of internal emails. In January 2021, Boeing settled to pay over $2.5 billion after being charged with fraud in connections to the crashes. In June 2020, the U.S. Inspector General's report revealed that MCAS problems dated several years before the accidents. The FAA found several defects that Boeing deferred to fix, in violation of regulations. In September 2020, the House of Representatives concluded its investigation and cited numerous instances where Boeing dismissed employee concerns with MCAS, prioritized deadline and budget constraints over safety, and where it lacked transparency in disclosing essential information to the FAA. It further found that the assumption that simulator training would not be necessary had "diminished safety, minimized the value of pilot training, and inhibited technical design improvements". In November 2020, the FAA announced that it had cleared the 737 MAX to return to service. Various system, maintenance and training requirements are stipulated, as well as design changes that must be implemented on each aircraft before the FAA issues an airworthiness certificate, without delegation to Boeing. Other major regulators worldwide are gradually following suit: In 2021, after two years of grounding, Transport Canada and EASA both cleared the MAX subject to additional requirements.he MAX subject to additional requirements.
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To address the unsafe conditions that led … To address the unsafe conditions that led to the grounding of the Boeing 737 MAX, the FAA issued an Airworthiness Directive that requires four design changes:
# Installing new flight control computer software. This change is intended to prevent erroneous MCAS activation, among other safeguards.
# Installing updated cockpit display system software to generate an AOA disagree alert. This will alert the pilots that the airplane's two AOA sensors are disagreeing by a certain amount indicating a potential AOA sensor failure.
# Incorporating new and revised operating procedures into the Airplane Flight Manual. This change is intended to ensure the flight crew has the means to recognize and respond to erroneous stabilizer movement and the effects of a potential AOA sensor failure.
# Changing the routing of horizontal stabilizer trim wires. This is intended to bring the airplane into full compliance with the FAA's wire-separation safety standards.
In addition to these four design changes, the FAA also will require operators to conduct an AOA sensor system test and perform an operational readiness flight prior to returning each airplane to service.ior to returning each airplane to service.
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The Boeing 737 MAX was initially certified … The Boeing 737 MAX was initially certified in 2017 by the U.S. Federal Aviation Administration (FAA) and the European Union Aviation Safety Agency (EASA). Global regulators grounded the plane in 2019 following fatal crashes of Lion Air Flight 610 and Ethiopian Airlines Flight 302. Both crashes were linked to the Maneuvering Characteristics Augmentation System (MCAS), a new automatic flight control feature.Investigations in both crashes determined that Boeing and the FAA favored cost-saving solutions, but ultimately produced a flawed design of the MCAS instead. The FAA's Organization Designation Authorization program, allowing manufacturers to act on its behalf, was also questioned for weakening its oversight of Boeing.ned for weakening its oversight of Boeing.
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