Before Lion Air plane crashed, pilots struggled to fix faulty sensor

Before Lion Air plane crashed, pilots struggled to fix faulty sensor

Before Lion Air plane crashed, pilots struggled to fix faulty sensor

The plane was intact with its engines running when it crashed, at more than 450 miles per hour (720 kph), into the Java Sea, Soerjanto Tjahjono, head of Indonesia's National Transportation Safety Committee, said at the time.

However according to an investigation by Indonesia's national transport committee (KNKT) the flight suffered the same technical issues the day before it crashed, and was not fit to fly.

All 189 people on board were killed when the new Boeing 737 MAX 8 crashed into the sea on October 29.

Nurcahyo Utomo, aviation head at the National Transport Safety Committee, told the BBC that "several problems occurred simultaneously" during the flight, including problems with measuring air speed and altitude, and with the stick shaker.

The angle-of-attack (AOA) sensors measure how well the plane's nose is positioned against the oncoming air.

The APA, a USA airline pilots' union, said carriers and pilots had not been informed by Boeing of certain changes in the aircraft control system installed on the new MAX variants of the 737.

"In the aftermath of the crash, pilots have expressed concern that they had not been fully informed about the new Boeing system. and how it would require them to respond differently in case of the type of emergency encountered by the Lion Air crew".

It details what is known by the authorities about the short time the Boeing 737 Max plane was in the air, but does not give a definitive cause for the accident.

The pilot of the 28 October flight chose to press on to Jakarta after shutting down the plane's anti-stall system, Utomo said. After recovering from a sudden drop in altitude, the pilots struggled to maintain level flight after passing 3,000 feet, before the aircraft went into a deep dive just over 10 minutes after take-off.

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However, Nurcahyo Utomo told the BBC: "We haven't found the information in the manual relevant to the new feature to the 737- MAX, related to the feature for the stall prevention system".

The MAX aircraft that crashed is the latest version of Boeing's popular 737 jetliner. It also pointed to maintenance work and procedures that had failed to fix the aircraft's repeated problems.

Following the publication of the initial report, Boeing released a statement in which the company assures that the 737 MAX "is as safe as any airplane that has ever flown the skies".

Data showed the 737's pilots managed to pull the jet's nose back a total of 26 times from takeoff until its plummet into the sea in what Lemme has called a "deadly game of tag".

"This is a situation where they're flying the plane manually, they don't expect this kind of motion, so that definitely threw them off", he said.

The report stopped short of making any recommendations to Boeing but the USA planemaker has come under fire for possible glitches on the 737 MAX - which entered service just previous year.

Coming from an aviation family, she said that Suneja's sister wanted to follow in his footsteps, but that the fatal accident had shaken her faith in the technology.

The black box data is consistent with the theory so far on what happened to Flight 610: Sensors on the fuselage sent incorrect information to the plane's anti-stall system and, due to that erroneous information, the system forced the nose down again and again. Pilots at American Airlines and Southwest Airlines complained this month that they had not been given all information about the new automated anti-stall safety system on the MAX.

The state-of-the-art 737 MAX 8 airplanes do not have this feature, yet the company failed to prominently warn pilots of the change even as airlines worldwide began taking delivery of the new jets past year, pilots say.

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