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Boeing knew of 737 MAX safety system glitch year before deadly crash

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Boeing Co did not tell US 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 US 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.

INDUSTRY DEBATE

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.

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Shraddha Murder Case: Police found spinal cord, 10 body parts recovered so far from the forest

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Photo by Hassan Rafhaan on Unsplash | (Representational Image)

The bones of Shraddha found by the Delhi Police in the forest of Mehrauli belong to the back part of the body. About 10 such body parts have been found so far, including the reed bone. Apart from this, some bones have also been recovered from the drain.

Delhi Police has received 10 parts of the body including the lower part of the spinal cord. The police have also found blood stains in the kitchen of the flat, whose samples have been sent for examination to find out whose the blood stains are.

Aftab had cleaned the fridge with chemicals so that when caught, he could spoil the forensic investigation. Delhi Police will soon call Shraddha’s father for a DNA sample. After which blood sample and bone sample will be sent to FLS, after which FSL will do a DNA test.

After the investigation so far, the police suspect that Shraddha’s body was dismembered in the bathroom after the murder. Along with this, the accused used to leave the water running from the shower so that the dead body could be easily cut and blood flowed. The FSL team along with Aftab was present during the investigation at his flat.

Source: Aajtak

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Fog will be seen in Delhi’s sky from tomorrow, cold will increase with drop in temperature!

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Representational Image | Image Source: Sumita Roy Dutta (Wikimedia)

After the passing of half of November, there is a rapid change in the weather. The country’s capital Delhi is feeling cold in the morning and evening, while the temperature is rising in the afternoon. However, a change in the weather can be seen in the coming days. According to IMD, the cold may increase in Delhi from tomorrow i.e. 17 November with a drop in temperature.

Delhi’s temperature condition

According to weather experts, in the next few days, icy winds will blow in the northwest direction, due to which Delhi’s temperature will drop and the cold will increase. Talking about the temperature, on November 17, the minimum temperature can be 12 degrees Celsius and the maximum temperature can be 27 degree Celsius. Two days ago i.e. on November 15, the minimum temperature was recorded at 15 degrees and the maximum temperature was 30 degrees. At the same time, there is a possibility of further decline in it for the next two days. On November 18, the minimum temperature can reach 11 °C and the maximum temperature can reach 26 °C.

Source Aajkal.in

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In Delhi, 37 lakh people apply for power subsidy

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Representational Image | Image Source: Snappygoat.com

After the 15-day-expansion by the Delhi government to select for the power subsidy scheme finished Tuesday, just three lakh individuals applied during the augmentation time frame. From September 14 till Tuesday night, 37,13,179 individuals applied to keep on benefiting from the subsidy scheme.

In spite of the fact that authorities are guaranteeing that a decent level of individuals has applied, the information shows a distinction of around 10 lakh customers when contrasted with a year ago. As per the information, around 46.8 lakh individuals profited from the advantage under the plan in 2021-22.

“This was the normal number of individuals who get the advantage, and the people who go under the 200 unit class probably applied. Likewise, the number varies as a few purchasers get the financed bill during winters and the number descends in summer as individuals use ACs, coolers, and fans,” said a senior authority from the power office.

He added that individuals who got sponsored bills under 400 units during winter should not have applied. “In any case, they can, in any case, apply before their next charging cycle and profit from the subsidy scheme,” said the official.

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