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Investigators have indicated that they are focusing on the Boeing 737's anti-stall system (File)
Indonesian investigators to present their first report on the Lion Air crash on Wednesday, A month after The new Boeing 737 sank in the sea, killing 189 pbadengers aboard the country's second-largest air disaster.
The report, which comes as research continues in the Java Sea for the badpit voice recorder, should not draw. firm conclusions from the ongoing investigation into the accident of October 29.
However, investigators indicated that they were focusing their attention on the Boeing 737's anti-stall system.
The jet aircraft systems had detected that it was stuck in Nurcahyo Utomo, investigator of the Indonesian Committee for Transport Safety (KNKT), told the parliament last week Nurcahyo Utomo, an informed investigator and warned the captain through a "shaker stick" which made the orders vibrate.
The Characteristics Enhancement System (MCAS) – a new automatic modification of the crashed model – activated and stuttered to prevent a stall, Utomo said.
The pilots reacted successfully for a period of time before the aircraft entered a final position.
The same anti-stall system was activated on the aircraft during a previous night's flight, but pilots in this case managed to shut down the system, Utomo said.
For the first time, the Boeing 737 MAX, the best-selling model in the 737 series, went into service a year ago.
MCAS was not described in the flight manual of Lion Air before the accident, said KNKT, nor in those used by US Airways according to the US pilot unions.
However, the piloting procedure for handling an uncontrolled stabilizer remains unchanged from previous models 737.
Boeing general manager Dennis Muilenburg said earlier this month that Boeing provides "all the information needed to fly our planes safely, "but the manual and the aircraft training methods were the subject of close examination after the accident.
In response to the initial findings of the aircraft 's flight data recorder, Boeing issued a bulletin reminding the procedures to be followed and recalling the procedures to be followed.
A spokeswoman for Boeing declined to comment on the investigation, but said Boeing had explained the operation of MCAS with more than 60 airlines. Since 1965, the airlines of Lion Air are facing problems of maintenance and training of the pilots. Investigators said the convicted aircraft had speedometer problems on its last four flights.
security issues highlighted by previous incidents.
Most air accidents are caused by a badtail of co-investigations usually take about a year.
Investigators should limit their report to the factual details of the aircraft's flight data recorder, which contains 69 hours of information on its last 19 flights.
But they can include immediate recommendations. if they have urgent safety concerns.
Searching for the badpit voice recorder is proving difficult after investigators said last week that its "ping" signal was no longer detected.
"We are still striving to find the CVR and it is very important.The CVR is bound to the credibility of the country so that we can avoid the same incident," said in parliament Soearjanto Tjahjono, president of the KNKT.
(With the exception of the title, this story was not published by NDTV staff and published from a syndicated feed.)
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