Lion Air: Pilots fought computerized security system earlier than deadly crash


However investigators say they’re at a loss to clarify why the pilots did not comply with the identical process carried out by one other flight crew the day past once they encountered an identical concern.

A preliminary report into the crash launched Wednesday by Indonesia’s Nationwide Transportation Security Committee (NTSC) reveals extra particulars in regards to the closing moments of Flight 610, however acknowledges many questions stay.

Information retrieved from the flight recorder exhibits the pilots repeatedly fought to override an computerized security system put in within the Boeing 737 MAX Eight airplane that pulled its nostril down greater than two dozen instances.

Based on the report, the pilots first manually corrected an “computerized plane nostril down” simply two minutes after takeoff, however carried out the identical process time and again till the airplane finally crashed into the Java Sea.

A unique flight crew had skilled the identical concern on a flight from Denpasar to Jakarta the day past, however had turned off the automated security characteristic, often known as the maneuvering traits augmentation system (MCAS) and took handbook management of the airplane.

The characteristic is new to Boeing’s MAX planes and routinely prompts to decrease the nostril to stop the airplane from stalling, primarily based on data despatched from its exterior sensors. Indonesian investigators have already pointed to points with the airplane’s angle-of-attack (AoA) sensors, which had proved defective on earlier flights.

AoA sensors ship data to the airplane’s computer systems in regards to the angle of the airplane’s nostril relative to the oncoming air to assist decide whether or not the airplane is about to stall.

CNN aviation analyst David Soucie stated that the circumstances created by the airplane’s computerized correction would have made pilot intervention “unimaginable.”

Responding to the report, Boeing stated it was “deeply saddened” by the lack of the Lion Air flight — however maintained the 737 MAX 8 “is as protected as any airplane that has ever flown the skies.”

Wednesday’s preliminary report recommends that Lion Air overview its security tradition whereas the investigation continues, and whereas officers seek for cockpit voice recorder (CVR), which is believed to be buried below mud on the ocean flooring.

It ought to reveal what the pilots have been saying and why they did not flip off the protection characteristic.

“We have to know what was the pilot dialogue in the course of the flight. What was the issue that will heard on the CVR. So why the motion distinction, that is the factor we have to discover. In the meanwhile I haven’t got the reply,” stated Captain Nurcahyo Utomo, NTSC’s head of aviation.

Subject reported two minutes into flight

The preliminary report stated Flight 610 reported a “flight management downside” minutes after taking off from the Indonesian capital on October 29 en path to the town of Pangkal Pinang, on the island of Bangka.

Inside 90 seconds of takeoff, the co-pilot requested air visitors management to verify air pace and altitude. Thirty seconds after that he reported that they’d skilled a “flight management downside,” the report stated.

After the plane’s flaps retracted following takeoff, the automated trim downside famous on the earlier evening’s flight returned, till the flight knowledge recorder stopped recording when the airplane crashed.

The report stated the pilots on the airplane’s penultimate flight reported that devices have been exhibiting inaccurate readouts from the angle-of-attack (AoA) sensors.

The report stated that the airplane was “routinely trimming” on the earlier flight — that’s, the pc was adjusting the plane’s angle — so the pilots switched to handbook trim and, as their security checklists did not suggest an emergency touchdown, they continued to Jakarta.

Additional upkeep on the AoA sensor was carried out in Jakarta previous to Flight 610’s takeoff the following morning. After the flight took off, the devices recorded a considerable discrepancy within the plane’s angle — as a lot as 20 levels.

As a part of the continued investigation, the defective AoA sensor will bear additional testing, the NTSC stated. It plans to complete its report inside 12 months.

Complaints about Boeing handbook

  • Lion Air timeline

  • Lion Air takes supply of 11 Boeing 737 MAX Eight planes, together with the downed jet.

  • Lion Air Flight 610 crashes into the Java Sea shortly after takeoff, killing all 189 individuals on board.

  • The airplane’s flight knowledge recorder (FDR) pulled from the seabed. Its cockpit voice recorder (CVR) stays lacking.

    The touchdown gear of the plane found.

  • Divers looking for the wreckage discover the primary fuselage and declare they’ll hear a sign from the plane’s lacking cockpit voice recorder (CVR).

    Syahrul Anto, 48, one of many divers collaborating within the seek for victims and wreckage from the flight is confirmed to have died whereas engaged within the operation.

  • Search groups lose the “ping” from the CVR.

    The top of Indonesia’s Nationwide Transportation Security Committee reveals that the airplane was intact with its engines operating when it crashed at excessive pace into the Java Sea.

  • Boeing points operational steerage to airways, advising pilots how you can deal with inaccurate cockpit readings from angle of assault (AOA) sensors. The FAA later issued its personal directive that suggested pilots about how to reply to related issues.

    Investigators analyzing the FDR say they found that the airplane was discovered to have a malfunctioning air pace indicator for its final 4 flights — together with the deadly closing journey.

  • The US-based Allied Pilots Affiliation alleges that Boeing withheld details about the potential hazards of recent flight-control options on the MAX 8.

  • Lion Air joins the APA in alleging Boeing did not warn pilots in regards to the potential hazards of a brand new security characteristic implicated within the crash.

  • Boeing’s inventory slides greater than 8% in every week as traders develop more and more involved that it might be held accountable for the lethal Lion Air crash.

    The mother and father of Rio Nanda Putrama, who died in crash, sue Boeing for its alleged “unsafe design” of the 737 Max Eight plane.

Supply: CNN reporting

The Allied Pilots Association (APA) and Lion Air’s operational director declare Boeing’s operational handbook for the MAX Eight didn’t comprise enough details about the MCAS system.
“We do not obtain any data from Boeing or from (the) regulator about that further coaching for our pilots,” Zwingli Silalahi, Lion Air’s operational director informed CNN on November 14. Each the pilot and co-pilot of Flight 610 have been experienced, the airline has stated, with 6,000 and 5,000 flight hours respectively.

Boeing stood by the plane’s security report. “We’re assured within the security of the 737 MAX. Security stays our high precedence and is a core worth for everybody at Boeing,” a spokesperson stated.

The mother and father of one passenger is suing Boeing, alleging the 737 MAX Eight had an unsafe design. The swimsuit alleges Boeing failed to speak a brand new security characteristic that hadn’t existed in earlier 737s.
Boeing launched an operational bulletin on November 6, every week after the crash, warning all airways about how you can deal with inaccurate readings associated to the airplane’s exterior sensors. The Federal Aviation Administration (FAA) later issued its personal directive that suggested pilots about how to reply to related issues.
Earlier this month, Indonesian investigators who examined the jet’s flight knowledge recorder stated there have been issues with the air pace indicator on the three flights earlier than the crash.

The airplane was intact with its engines operating when it crashed, at greater than 450 mph (720 kph), into the Java Sea, Soerjanto Tjahjono, head of Indonesia’s Nationwide Transportation Security Committee, stated on the time.

Tjahjono stated that because of the small dimension of the particles discovered and lack of the airplane’s engine blades, investigators decided that Flight 610 didn’t explode within the air, however was in “good condition” earlier than it crashed 13 minutes after takeoff.

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