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Utopia Talk / Politics / Boeing killed 189 passengers
Wed Nov 28 11:03:14
Boeing should be sold for 1 cent to Airbus, would save myriads of lives.


Lion Air crash: Pilots fought automatic safety system before plane plunged

By Euan McKirdy, CNN

Updated 1037 GMT (1837 HKT) November 28, 2018

The pilots of Lion Air Flight 610 were engaged in a futile tug-of-war with the plane's automatic systems in the minutes before it plunged into the ocean, killing all 189 people on board.
But investigators say they are at a loss to explain why the pilots didn't follow the same procedure performed by another flight crew the previous day when they encountered a similar issue.
A preliminary report into the crash released Wednesday by Indonesia's National Transportation Safety Committee (NTSC) reveals more details about the final moments of Flight 610, but acknowledges many questions remain.

Data retrieved from the flight recorder shows the pilots repeatedly fought to override an automatic safety system installed in the Boeing 737 MAX 8 plane, which pulled the plane's nose down more than two dozen times.
The system was responding to faulty data, which suggested that the nose was tilted at a higher angle than it was, indicating the plane was at risk of stalling.
According to the report, the pilots first manually corrected an "automatic aircraft nose down" two minutes after takeoff and performed the same procedure again and again before the plane hurtled nose-first into the Java Sea.
CNN aviation analyst David Soucie said that the circumstances created by the plane's automatic correction would have made pilot intervention "impossible."
"The fact that they fought against the MCAS (multiple) times with the trim settings was an impossible scenario to recover from," he said.

A different flight crew had experienced the same issue on a flight from Denpasar to Jakarta the previous day, but had turned off the automatic safety feature, known as the maneuvering characteristics augmentation system (MCAS) and took manual control of the plane.
The feature is new to Boeing's MAX planes and automatically activates to lower the nose to prevent the plane from stalling, based on information sent from its external sensors. Indonesian investigators have already pointed to issues with the plane's angle-of-attack (AoA) sensors, which had proved faulty on earlier flights.
AoA sensors send information to the plane's computers about the angle of the plane's nose relative to the oncoming air to help determine whether the plane is about to stall.

Responding to the report, Boeing said it was "deeply saddened" by the loss of the Lion Air flight -- but maintained the 737 MAX 8 "is as safe as any airplane that has ever flown the skies," and that the company is "taking every measure to fully understand all aspects of this accident."
Wednesday's preliminary report recommends that Lion Air review its safety culture while the investigation continues, and while officials search for cockpit voice recorder (CVR), which is believed to be buried under mud on the ocean floor.
It should reveal what the pilots were saying and why they didn't turn off the safety feature.
"We need to know what was the pilot discussion during the flight. What was the problem that may heard on the CVR. So why the action difference, this is the thing we need to find. At the moment I don't have the answer," said the NTSC's head of aviation, Capt. Nurcahyo Utomo.

The preliminary report said Flight 610 reported a issues minutes after taking off from the Indonesian capital on October 29 en route to the city of Pangkal Pinang, on the island of Bangka.
Within 90 seconds of takeoff, the co-pilot asked air traffic control to confirm air speed and altitude. Thirty seconds after that he reported that they had experienced a "flight control problem," the report said.
After the aircraft's flaps retracted following takeoff, the automatic trim problem noted on the previous night's flight returned, until the flight data recorder stopped recording when the plane crashed.

smart dude
Wed Nov 28 11:21:24
Are you sure it was Boeing that killed them? Or maybe just third world incompetence?
smart dude
Wed Nov 28 11:21:24
Are you sure it was Boeing that killed them? Or maybe just third world incompetence?
Hot Rod
Revved Up
Wed Nov 28 13:44:12

adelaide, this sounds more like a pilot error. All he had to do is turn off the nose down feature.

Wed Nov 28 21:13:36
Come now, it can't all be blamed on the pilots. Sure they unfortunately did not think to just turn off the faulty safety mechanism. But it cannot be ignored that the safety mechanism was indeed faulty.
Hot Rod
Revved Up
Wed Nov 28 21:59:49

It doesn't say but did the pilots from the day before, notify the company?

And did the company send out a memo?

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