Voice of America: Boeing Did Not Disclose 737 MAX Alert Issue to FAA for 13 Months

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Boeing did not tell U.S. regulators for more than a year that it inadvertently made an alarm alerting pilots to a mismatch of flight data optional on the 737 MAX, instead of standard as on earlier 737s, but insisted on Sunday the missing display represented no safety risk.

The U.S. plane maker has been trying for weeks to dispel suggestions that it made airlines pay for safety features after it emerged that an alert designed to show discrepancies in Angle of Attack readings from two sensors was optional on the 737 MAX.

Erroneous data from a sensor responsible for measuring the angle at which the wing slices through the air – known as the Angle of Attack – is suspected of triggering a flawed piece of software that pushed the plane downward in two recent crashes.

In a statement, Boeing said it only discovered once deliveries of the 737 MAX had begun in 2017 that the so-called AOA Disagree alert was optional instead of standard as it had intended, but added that was not critical safety data.

A Federal Aviation Administration official told Reuters on Sunday that Boeing waited 13 months before informing the agency in November 2018.

By becoming optional, the alert had been treated in the same way as a separate indicator showing raw AOA data, which is seldom used by commercial pilots and had been an add-on for years.

“Neither the angle of attack indicator nor the AOA Disagree alert are necessary for the safe operation of the airplane,” Boeing said.

“They provide supplemental information only, and have never been considered safety features on commercial jet transport airplanes.”

Boeing said a Safety Review Board convened after a fatal Lion Air crash in Indonesia last October corroborated its prior conclusion that the alert was not necessary for the safe operation of commercial aircraft and could safely be tackled in a future system update.

The FAA backed that assessment but criticized Boeing for being slow to disclose the problem.

Boeing briefed the FAA on the display issue in November, after the Lion Air accident, and a special panel deemed it to be “low risk,” an FAA spokesman said.

“However, Boeing’s timely or earlier communication with the operators would have helped to reduce or eliminate possible confusion,” he added.

Boeing attributed the error to software delivered to the company from an outside source, but did not give details.

Sunday’s statement marked the first time since the two fatal accidents that Boeing explicitly acknowledged doing something inadvertently in the development of the 737 MAX, albeit on an issue that it contends has no impact on safety.

​Boeing has said the feeding of erroneous Angle of Attack data to a system called MCAS that pushed the planes lower was a common link in two wider chains of events leading to both crashes, but has stopped short of admitting error on that front.

The angle of attack measures the angle between the air flow and the wing and helps determine whether the plane is able to fly correctly. If the angle becomes too steep, the flow of air over the wing is disturbed, throwing the plane into an aerodynamic stall. That means it starts to fall instead of fly.

Although the angle itself is key for onboard systems, the industry has debated for years whether such data should be included in already crowded cockpit displays because it is directly related to airspeed, which pilots already scrutinize.

Some analysts and academics say having the AOA Disagree alert installed would have helped Lion Air maintenance crew diagnose a problem on the penultimate flight of the 737 MAX jet that crashed in October, killing all 189 on board.

The 737 MAX was grounded worldwide over safety concerns following the Ethiopian crash in March, killing 157 people.

When the jet returns to service, all new aircraft will have a working AOA Disagree alert as a standard feature and a no-charge optional indicator showing the underlying data, Boeing said. That restores the situation found on the displays of previous 737NG models since around the middle of last decade.

Airlines with grounded 737 MAX jets will be able to activate the AOA Disagree function directly.

Boeing is also developing a software upgrade and training changes to the MCAS system that must be approved by global regulators before the jets can fly again.

Boeing has yet to formally submit the upgrades to the FAA for approval but could do as early as this week once it completes a special test flight.

Federal prosecutors, the Transportation Department inspector general’s office and a blue-ribbon panel are also looking into the 737 MAX’s certification. A U.S. House of Representatives panel will hold a hearing on the plane’s status with the FAA’s acting chief, Dan Elwell, and National Transportation Safety Board Chairman Robert Sumwalt on May 15.

Voice of America


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Газета.Ru – Новости дня: Ребенок погиб на детской площадке в Якутске

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В Якутске восьмилетний ребенок погиб, играя на площадке детского сада. Об этом сообщает ТАСС со ссылкой на Следственный комитет России.

По данным агентства, на ребенка упало игровое баскетбольное кольцо.

Как отмечается, мальчик скончался …

Газета.Ru – Новости дня


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Вести.Ru: Министры России и США обсудят положение дел в Венесуэле

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Министр иностранных дел России Сергей Лавров встретится сегодня с американским коллегой Майком Помпео. Одной из главных тем станет Венесуэла.

Download video: https://redirect.vgtrk.com/go/video/2178753

Вести.Ru


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Sputnik International – Breaking News & Analysis – Radio, Photos, Videos, Infographics: US Plans to Announce New Set of Sanctions Against Iran – Reports

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The Trump administration is reportedly expected to announce additional sanctions on Iran within the coming week, targeting new sections of the Iranian economy.

Sputnik International – Breaking News & Analysis – Radio, Photos, Videos, Infographics


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Информационное агентство УНИАН: Дорогое образование: почему будущим юристам, журналистам и экономистам может грозить подорожание обучения “на контракте”

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В Украине может существенно подорожать обучение в вузах – в экспертной среде вовсю идут обсуждения проекта постановления Кабинета министров о внедрении индикативной себестоимости. Эксперты уверяют, что таким образом правительство пытается сократить расходы на оплату обучения студентов. Но существуют некоторые риски.

Информационное агентство УНИАН


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Настоящее Время: Детали: король Луи и тысяча червей

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Расскажем о космическом роботе, который может пригодиться на детских утренниках. Побываем на полностью автономной ферме, процветающей за счет беспозвоночных представителей фауны. Узнаем, что помогает современным автомобилям ориентироваться на местности

Настоящее Время


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RSS: В акватории Желтого моря прошла торжественная церемония прощания отрядов кораблей, участвующих в российско-китайском учении «Морское взаимодействие – 2019»

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Экипажи кораблей поблагодарили друг-друга за совместную работу.

RSS


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Sputnik International – Breaking News & Analysis – Radio, Photos, Videos, Infographics: Analyst: Global Military Expenditure to Increase Into 2020s as Competition Grows

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World military spending is at an all-time high, amounting to $1.8 billion in 2018, an increase of 2.6% from 2017 the latest data from the Stockholm International Peace Research Institute (SIPRI) suggests. According to the report, global defence expenditures in 2018 amounted to $239 per person.

Sputnik International – Breaking News & Analysis – Radio, Photos, Videos, Infographics


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Michael Novakhov on Twitter from Michael_Novakhov (3 sites): mikenov on Twitter: Russian Aeroflot plane makes emergency landing in Moscow – BBC News (Top stories -…) michael_novakhov.newsblur.com/story/russian-…

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Russian Aeroflot plane makes emergency landing in Moscow – BBC News (Top stories -…) michael_novakhov.newsblur.com/story/russian-…


Posted by

mikenov
on Monday, May 6th, 2019 3:06am

mikenov on Twitter

Michael Novakhov on Twitter from Michael_Novakhov (3 sites)


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Michael Novakhov – SharedNewsLinks℠: Russian Aeroflot plane makes emergency landing in Moscow – BBC News

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Michael Novakhov – SharedNewsLinks℠: US deploying carrier, bomber task force in response to ‘troubling’ Iran actions – CNN

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“Russia Ukraine” – Google News: Ukraine’s new president Zelensky woos EU with reform pledge – Financial Times

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Ukraine’s new president Zelensky woos EU with reform pledge  Financial Times

Volodymyr Zelensky, the former comedian just elected as Ukraine’s president, has sent emissaries to Brussels to try to bolster his credibility and convince the EU …

“Russia Ukraine” – Google News


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