Crashed Lion Air jet flew four times with damaged airspeed gauge

Crashed Lion Air jet flew four times with damaged airspeed gauge

Indonesian officials said they have downloaded the data from a black box recorder for Lion Air flight 610 which crashed into Java sea last week while at least 105 body bags containing parts of passengers have been handed to the national police hospital in Jakarta for identification.

On Tuesday, Boeing said that it released an Operations Manual Bulletin (OMB) to airlines on how to address problems when an angle of attack, or AOA, sensor provides erroneous readings.

JAKARTA-A crucial sensor was replaced on a Lion Air jet the day before it plunged into the Java Sea, and that sensor replacement may have exacerbated other problems with the plane, Indonesian investigators said Wednesday.

When these sensors break down, the plane can go into what's known as "aerodynamic stall", a status in which its wings can't produce enough lift and the aircraft starts to dive.

Boeing issued a safety warning today about its new 737 Max jets which could have a fault that causes them to nose-dive.

It did not give more details and did not speculate on how the indicator problem may have played a role in the crash, as it continues to mine the flight recorder - seen as key to answering why a almost brand new plane fell out of the sky. All 189 people aboard the plane were killed.

There are also procedures for pilots to follow in the event of missing data from damaged sensors on the fuselage skin, but it remains unclear how much time the crew of Flight JT610 had to respond because they were only a few thousand feet in the air. That failure caused the aircraft's systems to think the airplane was in danger of stalling, causing the computer to steadily adjust the trim tabs on the horizontal stabilizer to nose the aircraft downward, thereby picking up speed.

Minutes after takeoff the plane suddenly nose-dived hitting speeds of 600mph before slamming into the sea.

More news: Google's Pixel Slate Available for Pre-Order

Even if an angle of attack sensor on a jet is faulty, there's generally a backup system in place for the critical component, and pilots are trained to handle a plane safely if those sensors fail, airline safety experts said.

Soerjanto Tjahjono, chairman of Indonesia's National Transportation Safety Committee, said the problem was similar on each of the four flights, including the doomed one on October 29.

Indonesian investigators on Monday said an airspeed indicator had malfunctioned on the plane's last four flights.

The Boeing 737 MAX is a more fuel-efficient version of the manufacturer's popular single-aisle jet. But the urgency of a fatal accident can trigger a flurry of such notices.

The body asked the U.S. National Transportation Safety Board "and Boeing to take necessary steps to prevent similar incidents, especially on the Boeing 737 Max, which number 200 aircraft all over the world", it said in the statement.

After an engine on a Southwest Airlines Co plane fractured earlier this year over Pennsylvania, killing a passenger, CFM International Inc. issued multiple bulletins to operators of its CFM56-7B power plants.

For a safe climb-out, the aircraft's nose is pitched up at a small angle. Reuters spoke to a pilot and an airport authority official who confirmed that a problem with the plane had been indicated in a radio alert.

Related Articles