Jakarta, Nov 28 : Black box data show Lion Air pilots struggled to maintain control of a Boeing jet as its automatic safety system repeatedly pushed the plane's nose down, according to a draft of a preliminary report by Indonesian authorities investigating last month's deadly crash.

The investigators are focusing on whether faulty information from sensors led the plane's system to force the nose down. The new Boeing 737 MAX 8 plunged into the Java Sea on October 29, killing all 189 people on board, including an Indian pilot.

Information from the Lion Air jet's flight data recorder was included in a briefing for the Indonesian Parliament. Indonesian authorities were due to release the findings Wednesday but not to draw conclusions from the data they present.

Peter Lemme, an expert in aviation and satellite communications and a former Boeing engineer, wrote an analysis of the data on his blog.

The MAX aircraft, the latest version of Boeing's popular 737 jetliner, includes an automated system that pushes the nose down if a sensor detects that the nose is pointed so high that the plane could go into an aerodynamic stall.

Lemme described "a deadly game of tag" in which the plane pointed down, the pilots countered by manually aiming the nose higher, only for the sequence to repeat about five seconds later.

That happened 26 times, but pilots failed to recognize what was happening and follow the known procedure for countering incorrect activation of the automated safety system, Lemme told The Associated Press.

Lemme said he was also troubled that there weren't easy checks to see if sensor information was correct, that the crew of the fatal flight apparently wasn't warned that similar problems had occurred on previous flights, and that the Lion Air jet wasn't fixed after those flights.

"Had they fixed the airplane, we would not have had the accident," he said. "Every accident is a combination of events, so there is disappointment all around here," he said.

Boeing did not immediately respond to two emails and a phone call requesting comment.

The company said last week that it remains confident in the safety of the 737 MAX and had given airlines around the world two updates to "re-emphasize existing procedures for these situations."

Pilots at American Airlines and Southwest Airlines complained this month that they had not been given all information about the new system on the MAX. More than 200 MAX jets have been delivered to airlines around the world.

The Indonesian investigation is continuing with help from US regulators and Boeing. Searchers have not found the plane's cockpit voice recorder, which would provide more information about the pilots' actions.

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Dhaka (PTI): The Election Commission (EC) has demanded extra security for its chief, other commissioners and officials as fresh unrest visibly gripped Bangladesh after gunmen shot an upcoming parliamentary polls candidate and frontline leader of last year's violent street movement dubbed 'July Uprising'.

"The EC has written to the Inspector General of Police (IGP) urging comprehensive security arrangements for the Chief Election Commissioner (CEC), Election Commissioners (ECs), senior officials of the Election Commission Secretariat," the state-run BSS news agency reported on late Saturday. 

The EC simultaneously sought the extra security for its field-level offices ahead of the 13th national election, as two of them came under attack in southeastern Lakshmipur and southwestern Pirojpur by unidentified miscreants after the announcement of the schedule for the upcoming polls on Thursday. 

The commission demanded an additional escort vehicle for the CEC, while one such police escort with a vehicle was currently in place for him. It asked for round-the-clock police escorts for the four commissioners and the senior secretary. 

The letter said the enhanced security measures were "urgent and necessary," while EC officials said their 10 regional offices, 64 district election offices and 522 sub-district level offices would store important documents and election materials. 

The EC on Thursday said the upcoming parliamentary election would be held on February 12 next year, while a day later, Sharif Osman Hadi was shot from a close range in the head, critically wounding him, as he initiated his election campaign from a constituency in the capital. 

Critically ill former prime minister Khaleda Zia's Bangladesh Nationalist Party (BNP) simultaneously asked Muhammad Yunus' government to provide security for all candidates in the upcoming election after the attack on Hadi, who leads a radical right-wing cultural group called Inquiab Mancha. 

"We demand that the real culprit be identified immediately and brought under the law, and we call upon this government to ensure the security of all candidates without delay," BNP Secretary General Mirza Fakhrul Islam Alamgir said. 

Hadi was also a frontline leader of last year's student-led violent uprising that toppled then-prime minister Sheikh Hasina’s Awami League government on August 5, 2024. 

His Inquilab Mancha was also at the forefront of a campaign to disband the Awami League, which the interim government complied with in May this year, disqualifying the party from contesting the polls. 

The government on Saturday ordered a nationwide security clampdown called 'Operation Devil Hunt 2' amid escalated fears over the law and order situation and promised to issue firearms licenses for election candidates for their own security. 

Home adviser (retd) Lieutenant General Jahangir Alam Chowdhury said the government had taken steps to ensure special security for the "frontline fighters" of the July Uprising and promised to issue firearms licenses for the election candidates. 

He emphasised that the second phase of the 'Devil Hunt' was aimed at helping ensure public safety and combat the growing threat of illegal arms. 

The operation was initially launched in February this year following protests over an attack on the private house of a former minister of the ousted government in the northern suburb of the capital, when it targeted alleged "henchmen" and supporters of the now disbanded Awami League.