Boeing warns pilots about 'angle of attack' sensors after 737 MAX crash

Parts of an engine of the ill-fated Lion Air flight JT 610 are recovered from the sea during search operations in the Java Sea

Parts of an engine of the ill-fated Lion Air flight JT 610 are recovered from the sea during search operations in the Java Sea

The plane plummeted into the sea a day after having a critical sensor replaced.

There are a total of 49 Boeing 737 Max planes in service across the USA, including 26 737 Max 8 planes in service at Southwest Airlines, 16 at American Airlines and seven Max 9 planes at United Airlines. "If there are urgent findings to be delivered, we will convey them to the operators and to the manufacturer", he said, according to AP.

The technical log shows the airliner had reported an "unreliable" airspeed reading on four of the prior flights, investigators said.

Meanwhile, the Wall Street Journal characterized Boeing's bulletin as a "safety alert" covering "potentially suspect flight-control software that can confuse pilots and lead to a steep descent of the affected aircraft model". The company didn't response to requests for comment.

The Chicago-based planemaker has delivered 219 Max, the latest and most advanced 737 jets, since the new models made their commercial debut past year with a Lion Air subsidiary.

Utomo confirmed to CNN that there were two airspeed indicators in the cockpit. According to the company, the instructions are routine for trained pilots. The only way to prevent this, is for the pilot to intervene and manually deactivate the system. Boeing will warn pilots to follow an existing procedure to handle the problem, the person said.

"When you see recurring problems, it says the normal easy fixes aren't solving it", he said. The audio device may be crucial to unraveling what happened during the flight's final moments.

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Records show that the charges were eventually dismissed after Beierle followed the conditions of a deferred prosecution agreement. In the videos, Beierle pontificated from a dimly lit bedroom, with an unmade bed and a pile of cardboard boxes in the background.

The JT610 flight, carrying 181 passengers and eight crew members, crashed at S 5 49.052 E 107 06.628 after departing from Soekarno-Hatta Airport on Oct 29 at 6.20am. The agency was asking Boeing and USA authorities what action to take to prevent similar problems on this type of plane around the world, he said.

Divers are still hunting for the plane's cockpit voice recorder. Both that flight and its October 28 flight from Bali to Jakarta had erratic speed and altitude shortly after takeoff.

"Intermittent failures are very hard for maintenance personnel to trouble-shoot because a lot of times they just say, 'Cannot duplicate, ' and they write it up that way", Diehl said. However, soon after takeoff, the jetliner entered into a nosedive at a speed of 600 miles per hour.

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. In 2015, a wasp nest plugged the sensors on an Allegiant Air jet leaving St. Petersburg, Florida, forcing pilots to cut the flight short and land in Orlando.

Peter Fitzpatrick, a spokesperson for Air Canada, told CBC News it had received the bulletin and was following the plane maker's recommendations, "as we do with all such advisories from manufacturers and government safety regulators".

Even with modern Global Positioning System tracking, planes need to calculate their precise speed through the air.

No injuries were reported in the incident that damaged the aircraft's wing. If either of the pressure sensors are blocked, it can cause erroneous readings.

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