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Tech & Science Boeing is promising 3 fixes to the faulty autopilot behind the 737 Max crashes to let pilots stop it forcing the plane into an unstoppable nose-dive

15:40  09 december  2019
15:40  09 december  2019 Source:   businessinsider.com.au

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Two Boeing 737 Max crashes killed 346 people and grounded the jet, which experienced software problems. A Lion Air flight crashed into the Java Sea five months earlier. The two accidents killed a total of 346 passengers and More: Boeing says 737 Max software is fixed , now it 's up to the FAA.

Because the 737 Max had been outfitted with larger new engines that could cause its nose to pitch dangerously skyward, Boeing had added a maneuvering The autopilot then switched itself off and handed control of the plane over to the pilots , as it was designed to do under such circumstances.

a man in a suit using a computer: Inside a Boeing 737 Max cockpit. Inside a Boeing 737 Max cockpit.
  • Boeing is promising three key fixes to a system blamed for the fatal crashes of its 737 Max jet, according to a leaked presentation made public by CBS News.
  • It deals with changes to the Manoeuvring Characteristics Augmentation System (MCAS), which was a factor in the two crashes which led to the jet's worldwide ban from service.
  • MCAS was designed to automatically push the plane's nose down to keep the jet stable in the air. But it misfired, seemingly based on faulty data from a sensor, forcing the plane into an unstoppable dive.
  • In the first of the two crashes, MCAS forced the plane's nose down more than 20 times, bringing about a fatal dive which the pilots tried - but failed - to override.
  • Boeing will now require two sensors to agree in order to activate MCAS, the presentation said. They will also include a manual override and prevent it from activating over and over.
  • Visit Business Insider's homepage for more stories.

Boeing is promising three fixes for the faulty autopilot system widely attributed as a cause of two deadly crashes by the 737 Max plane,CBS News reported Sunday.

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crashed Boeing 737 MAX 8 aircraft have less than 40 seconds to prevent a crash if the planes new to the 737 MAX 8 aircraft, a consequence of a modification to the placement of the engine on pushed the nose of the plane down, eventually ratcheting the plane into a nosedive towards the

The plane builder wants pilots to brush up on what to do if a faulty sensor sends a 737 MAX into a dive . U.S. investigators examine recovered parts of the Lion Air jet that crashed into the sea at Tanjung Priok Port in Jakarta, Indonesia. Divers have recovered the flight data recorder from the

The manufacturer told stakeholders in Seattle last week it will introduce changes to the jets Manoeuvring Characteristics Augmentation System (MCAS), CBS News reported, citing documents from a presentation by the company.

The pilots in both crashes had struggled with MCAS, which was designed to automatically push the plane's nose down to stabilise the jet.

In the first crash, suffered by Indonesia's Lion Air, MCAS activated at least 20 times before the crash.

The software had relied on data from one of the plane's two "angle-of-attack" (AOA) sensors, which monitored the plane's position in the sky.

Both pilots tried to push back against the system by angling the plane back up dozens of times, but MCAS kept reactivating - which ultimately led to the two planes crashing and killing 346 people.

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The beleaguered Boeing 737 MAX is now facing another headwind. This time, there are safety concerns regarding the autopilot . Here is the list, as reported by Bloomberg , of issues Boeing needs to fix with the 737 MAX : The potential difficulty pilots have in turning the jet’s manual trim wheel.

A year before the plane was finished, Boeing made the system more aggressive and riskier. In both doomed flights, pilots struggled as a single damaged sensor sent the planes into irrecoverable nose - dives within Boeing wanted to limit changes to the Max , from previous versions of the 737 .

a man standing on a rock: Investigators search through the debris at the site of the 737 Max Ethiopian Airlines crash in March 2019. Investigators search through the debris at the site of the 737 Max Ethiopian Airlines crash in March 2019.

Boeing said it has addressed these problems with updated software, CBS News reported. Here are the changes they plan to make, according to the news network:

  1. MCAS will now rely on readings from two AOA sensors as opposed to just one in the original system. The new software will only activate if both sensors agree that the plane's nose is too high. Boeing had announced this update earlier this year.
  2. Pilots will be able to deactivate the system.
  3. When they do so, MCAS will not automatically reactivate. The original system had automatically reactivated multiple times.

Boeing also told attendees that it had flown 1,850 flight hours with the software updates, and spent more than 100,000 employee hours in engineering and test-developing the new issues, CBS News reported.

Multiple Boeing employees have spoken of the company's internal pressures to develop planes quickly and to keep manufacturing costs down.

Inside the closed-door meeting where Boeing tried to reassure 737 Max stakeholders as the airlines and passengers get ready to fly the plane again

  Inside the closed-door meeting where Boeing tried to reassure 737 Max stakeholders as the airlines and passengers get ready to fly the plane again Boeing held a meeting last week for pilots, flight attendants, union and airline officials, and analysts, hoping to reassure them about the 737 Max. Business Insider spoke with attendees who described the meeting as "transparent," "humbling," and productive. The head of American Airlines' flight attendants' union, who previously said she and her members would refuse to work on the plane if it was not safe, said she felt Boeing was making progress ensuring that "this plane is not only safe, but that it gets in the air correctly.

Boeing dismissed concerns about a powerful new anti-stall system on the 737 Max for months, insisting The pilots had a short window to react before going into an irrecoverable nose dive . The system, according to the investigators’ findings, appears to have forced the nose of the plane down

Boeing 737 MAX 8 pilots reported their planes nosedived and lost altitude in at least two incidents As Boeing deals with the fallout of its Boeing 737 MAX 8 planes being banned around the world In one incident, as soon as the captain put the plane on autopilot , the co- pilot said, “Descending,” and

Boeing has not yet responded to Business Insider's request for comment on the reported changes.

a flock of birds flying over a city: Undelivered Boeing 737 Max planes parked in a Boeing property in Seattle, Washington, in August 2019. All 737 Max jets are currently grounded. Undelivered Boeing 737 Max planes parked in a Boeing property in Seattle, Washington, in August 2019. All 737 Max jets are currently grounded.

The company's presentation last week was meant to reassure aeroplane analysts, airlines, pilots, and flight attendants, CBS News reported. Regulators around the world have grounded their 737 Max jets, and pilots and flight staff have publicly expressed fears of flying them again.

The US Federal Aviation Administration (FAA) had also come under pressure for vouching for the 737 Max's safety before the two crashes. The agency now wants to dramatically change its certification process.

Internal messages exchanged by Boeing employees in 2016, which were released in October, also suggested that they had known about the MCAS' problems but misled the FAA about its dangers.

The 737 Max is expected to return to service in March 2020, though Boeing is trying to get it back in the air sooner.

  • Read more:
  • Boeing's CEO is about to face Congress in an inquiry on the 737 Max. Here's the complete history of the plane that's been grounded since 2 crashes killed 346 people 5 months apart.
  • Internal Boeing survey hints at a culture of rushing through aircraft safety features in the years before 2 fatal 737 Max crashes
  • The spotlight on Boeing and the FAA will only get hotter after the 737 Max crisis. Now global regulators are focusing on the plane-maker's newest jet.
  • Boeing's 737 Max shouldn't be allowed to fly with a controversial flight-control system, an aviation regulator reportedly said in leaked emails

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