Published: Thu, November 08, 2018
World News | By Sandy Lane

Boeing issues safety notice for 737 MAX

Boeing issues safety notice for 737 MAX

If the flow is disrupted by a plane going too slow or climbing too steeply, that can cause an aerodynamic stall and a plane will plummet.

There are now a little over 200 737 MAX jets in use.

Boeing's warning came in the form of an Operations Manual Bulletin (OMB) directing operators to existing flight crew procedures to address circumstances where there is erroneous input from an AoA sensor.

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.

According to reports, the initial investigation into the flight pattern of JT610 has suggested that the sensor was producing incorrect data which the flight computer processed to trigger further errors. They are paired with separate indicators measuring the degree to which the nose is pointed up, down or level.

Two Indonesian navy vessels took the relatives to the crash location on Tuesday where a massive search effort is still underway.

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Pilots should then switch off the automatic trim system and carry out trim adjustments manually, the instructions say.

Indonesia's government ordered an inspection of all the country's Boeing 737 Max planes following the crash. "I'm not aware of any other operator having this problem".

The Lion Air 737 Max 8 jetliner plummeted towards the Java Sea minutes after takeoff from Jakarta airport in Indonesia on October 29.

"The plane disintegrated or broke up after hitting the water, the debris of the plane was found scattered within a 250-metre radius on the sea floor", he said. Earlier that same year, a Turkish-owned charter flight crashed, killing 189 people, after the pilots' airspeed indicators told them the plane was moving much faster than it really was.

The captain and first officer flying from Bali to Jakarta the night before the crash had indicators displaying differences in angle of 20 degrees, KNKT said, but that flight landed safely despite the issues in the air.

Indonesian accident investigators said on Monday that an airspeed indicator on the crashed jet was damaged for its last four flights, but United States authorities responded cautiously to suggestions of fleet-wide checks.

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On Monday, November 5, Indonesian officials arranged for a meeting between the families of the victims of downed Lion Air flight JT-610 as well as the search and rescue officials investigating the accident.

The Lion Air plane that crashed into the ocean last week had been experiencing a "technical problem" with its airspeed indicator and that the gauge had malfunctioned on the jet's final four flights, investigators said Monday.

On the basis of the Oct 28 flight, Indonesian investigators said they'd provided recommendations to Boeing for distribution to airlines around the world about how to deal with a similar situation.

In a statement, the FAA said it plans to mandate the use of Boeing's instructions about sensors.

Boeing 737 with 189 people aboard goes down into the Java Sea shortly after take-off; unclear if there are survivors.

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