Boeing issues bulletin on 737 Max planes after one crashed in Indonesia

Boeing to Issue Alert Its Planes Can Abruptly Dive During Flight - Report

Boeing to Issue Alert Its Planes Can Abruptly Dive During Flight - Report

Boeing said its bulletin underscored "existing flight crew procedures" created to address circumstances where the information coming into the cockpit from the sensors was wrong.

Bloomberg News earlier reported that Boeing was said to be preparing to issue an alert to operators of the 737 Max jet in response to the investigation into the October 29 crash of the Lion Air plane, which saw 189 people killed.

Neither carrier said they had received any reports from pilots of issues with the sensor, which calculates the "angle of attack", a measurement of the angle of the plane's wing and airflow needed to maintain lift.

The bulletin cautions operators of the 737 Max that erroneous readings from one of the plane's sensors can cause the aircraft to enter into a sudden dive, Bloomberg reported.

The doomed jet was a Boeing 737 -Max 8, one of the world's newest and most advanced commercial passenger planes, and there is still no answer as to what caused the crash.

This affects almost 250 aircraft flown by USA airlines like Southwest, American and United, the FAA said.

Boeing has sent 219 737 MAX jets to customers globally, with 4,564 orders for jets yet to be delivered.

The operations-manual bulletin was issued Tuesday, Boeing said in a statement posted to Twitter, and tells flight crews to use existing guidelines when dealing with erroneous inputs from the so-called angle of attack sensor.

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Indonesian accident investigators said on Monday that an airspeed indicator on the crashed jet was damaged for its last four flights, but US authorities responded cautiously to suggestions of fleet-wide checks. If the problem isn't fixed, it can cause planes to simply fall out of the sky. The AD now affects 246 total Boeing 737 MAX aircraft in service globally.

Attempts to fix the issues were unsuccessful, NTSC chairman Soerjanto Tjahjono has said, with the pilots of the 737's second-to-last flight experiencing conflicting information despite an AOA sensor being replaced.

The Lion Air crash was the first involving the new version, which airlines introduced into service previous year.

On the fatal flight, the plane hit the water at very high speed after the flight crew had been cleared to return to the airport several minutes after takeoff.

The Lion Air investigation comes after Indonesia's government ordered an inspection of all Boeing 737 Max 8 planes in the country.

The US-based aircraft manufacturer plans to warn operators that these jets can abruptly dive because of "erroneous readings from a flight-monitoring system", according to the outlet.

Indonesian officials said on Wednesday they would extend the search by three days. The data from the flight recorder and Boeing's statement have provided the first clues, but rescuers are still searching for the device that records voices in the plane's cockpit.

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