Boeing jet crashed in Indonesia after key sensor replaced

The bulletin warns operators that erroneous readings from a flight-monitoring system can cause the new 737 Max models to aggressively dive

The bulletin warns operators that erroneous readings from a flight-monitoring system can cause the new 737 Max models to aggressively dive

The incident comes as Boeing issued a warning to airlines about how to address incorrect cockpit readings as investigators probe what happened before Lion Air Flight 610 plunged into the Java Sea, killing 189 people.

Indonesia's National Transportation Safety Committee (NTSC) said it had agreed with Boeing on procedures that the airplane manufacturer should distribute globally on how flight crews can deal with "angle of attack" sensor problems following the October 29 crash that killed all 189 people on board.

A Boeing 737-900ER operated by PT Lion Mentari Airlines clipped a pole late Wednesday while taxiing at Bengkulu airport in southern Sumatra, shearing the tip of its left wing, the carrier said in a statement. If the flow is disrupted by a plane going too slowly or climbing too steeply, that can cause the plane to lose the lift required for flight and plummet.

In fact, the 737 remains the best-selling airliner of all time, while the new MAX variant quickly became quickest selling plane in Boeing history.

A US aviation regulator plans to mandate that airlines follow an advisory issued by Boeing Co.

"Our pilot was simply following the guidance and instructions provided by the AMC officer", he told The Australian " All movement from the parking stand to the runway is the responsibility of the AMC.

Service bulletins can be followed by airworthiness directives to airlines by the Federal Aviation Administration, giving the recommendations extra weight.

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The newspaper said the findings suggest investigators could be looking at a software problem or a mistaken interpretation by flight crew as having played key roles in the Lion Air crash.

"A "ping" has been detected from the second black box but the signal was very weak, possibly because it was encased in mud", said Nurcahyo Utomo, an air accident official at the transportation safety committee (KNKT).

Boeing has issued a new warning to all pilots flying its 737 MAX aircraft, the model of the recently crashed Lion Air flight JT610 from Jakarta, Indonesia.

Lion's earlier admission that the jet had a technical issue - and the captain's request to turn back to the airport minutes before the crash - have raised questions about whether it had faults specific to one of the world's newest and most advanced commercial passenger planes.

The airline said at the time that it had 61 "firm orders" for the planes.

The angle of attack readings are fed into a computer that in some cases will attempt to push down the nose using the pitch trim system. The Boeing bulletin says it is possible that the system will continue to put the aircraft nose down, right up to the limit, unless it is deactivated.

The plane and the pilots were grounded, while passengers were escorted off the aircraft and moved to another plane, which took off to a considerable delay compared to the original flight schedule.

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