Based on initial investigation of the Lion Air plane crash, the U.S. watchdog Federal Aviation Administration and Boeing had issued advisories on Wednesday on what could be done to prevent similar incidents involving the Boeing 737 Max.A DGCA official said the two advisories talk about erroneous high angle of attack sensor input and corrective action for the same as it has potential for repeated nose-down trim commands of horizontal stabilizer.
The US plane-maker said investigators looking into the Lion Air crash had found that one of the "angle of attack" sensors on the aircraft had provided erroneous data. The service was operated by a two month old 737 MAX 8.
The company noted that the warning provides guidance to pilots and operators of new aircraft on how to proceed in these circumstances.
Flight JT610 had radioed a request to return to Jakarta to land but never turned back toward the airport, according to Indonesia's National Transportation Safety Committee.
Airline safety experts said pilots are trained to handle a plane safely if crucial sensors fail, while backup systems are usually in place as well.
The nearly brand-new plane, with just 800 hours of flight time, was cleared for the October 29 flight after maintenance overnight, Lion Air has said.
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Indonesia's search and rescue agency said they are still working to locate the cockpit voice recorder which they believe is amongst the other wreckage under the sea. However, if the sensor malfunctions, it can cause the plane's computers to erroneously think it is in a stall-which can then command the aircraft to abruptly dive.
Lion Air Group's Managing Director, Captain Daniel Putut Kuncoro Adi, told CNN Lion Air strictly follow Boeing's guidance for operating the 737 MAX 8s, as laid out in the maintenance manual book.
The directive gives regulatory weight to Boeing's safety bulletin it sent to operators based on findings from the ongoing Indonesian investigation. The single-aisle family is Boeing's biggest source of profit.
The angle of attack readings are fed into a computer that in some cases will attempt to push down the nose using the elevator trim system.
Aircraft and engine manufacturers routinely send bulletins to air carriers noting safety measures and maintenance actions they should take, majority relatively routine. But the urgency of a fatal accident can trigger a flurry of such notices.
Pilots can counteract this for up to 10 seconds at a time by pushing a switch on the airplane's controls. In the early days of the jet age, the pitch trim system was linked to several accidents. United Technologies supplies the angle-of-attack sensors and indicator for the 737 Max, according to Airframers.net. There were more than 180 people on board.