Jakarta, Nov 28 : A Lion Air jet that crashed last month should have been grounded over a recurrent technical problem and never permitted to make the fatal flight, Indonesian authorities said Wednesday in a report that took aim at the carrier's poor safety culture.

The Boeing 737 MAX vanished from radar about 13 minutes after taking off from Jakarta on October 29, slamming into the Java Sea moments after it had asked to return to the capital.

The preliminary crash report from Indonesia's transport safety agency did not pinpoint a definitive cause of the accident, which killed all 189 people on board, including an Indian pilot, with a final report not likely to be filed until next year.

But investigators said that Lion Air kept putting the plane back into service despite repeatedly failing to fix a problem with the airspeed indicator in the days leading up to the fatal flight.

Its second last flight was from Denpasar in Bali to Jakarta.

"During (that) flight, the plane was experiencing a technical problem but the pilot decided to continue," Nurcahyo Utomo, aviation head at the National Transport Safety Committee, told reporters.

"The plane was no longer airworthy and it should not have kept" flying, he added.

The findings will heighten concerns there were problems with key systems in one of the world's newest and most advanced commercial passenger planes.

Investigators have previously said the doomed aircraft had problems with its airspeed indicator and angle of attack (AOA) sensors, prompting Boeing to issue a special bulletin telling operators what to do when they face the same situation.

The report confirmed that initial finding, saying the plane's data recorder detected an issue with the AoA.

It also said the plane's "stick shaker" -- the steering-wheel like handles in front of the pilots that vibrates to warn of a system malfunction -- was "activated and continued for most of the fight."

An AOA sensor provides data about the angle at which air is passing over the wings and tells pilots how much lift a plane is getting. The information can be critical in preventing an aircraft from stalling.

The Indonesian National Transportation Safety Committee has retrieved one of the plane's black boxes -- the flight data recorder -- but is yet to locate the cockpit voice recorder.

Black box data showed the plane also had an airspeed indicator issue on multiple earlier flights, investigators said.

Lion must take steps "to improve the safety culture" and ensure "all the operation documents are properly filled and documented", the transport agency said.

Despite a dubious safety record and an avalanche of complaints over shoddy service, the budget carrier's parent Lion Air Group, which also operates Batik Air and Wings Air, has captured half the domestic market in less than 20 years of operation to become Southeast Asia's biggest airline.

Indonesia's aviation safety record has improved since its airlines, including national carrier Garuda, were subject to years-long bans from US and European airspace for safety violations, although the country has still recorded 40 fatal accidents over the past 15 years.

The report stopped short of making any recommendations to Boeing but the US planemaker has come under fire for possible glitches on the 737 MAX -- which entered service just last year.

The APA, a US airline pilots union, said that carriers and pilots had not been informed by Boeing of certain changes in the aircraft control system installed on the new MAX variants of the 737.

"I am really surprised if Boeing has not shared all the flight performance parameters with pilots, unions, and training organisations," University of Leeds aviation expert Stephen Wright told AFP before the report was released, adding that "a deliberate omission would have serious legal ramifications" Several relatives of the crash victims have already filed lawsuits against Boeing, including the family of a young doctor who was to have married his high school sweetheart this month.

Lion Air Flight JT610 plunged into the sea less than half an hour after taking off on a routine flight to Pangkal Pinang city.

Authorities have called off the grim task of identifying victims of the crash, with 125 passengers officially recognised after testing on human remains that filled some 200 body bags.

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Patna (PTI): Bihar was abuzz with speculation on Wednesday over rumours that JD(U) president and the state’s longest-serving Chief Minister Nitish Kumar may move to the Rajya Sabha, paving the way for the BJP to take the top post while accommodating his son Nishant as deputy CM.

However, senior BJP leader and Union minister Giriraj Singh dismissed the rumour as a "Holi prank", asserting "Nitish Kumar ji is the chief minister".

The filing of nomination papers for five Rajya Sabha seats in the state will close on Thursday.

While the BJP has named its two candidates, including national general secretary Nitin Nabin, and confirmed a second consecutive term for junior NDA ally Upendra Kushwaha, the JD(U) is yet to officially announce its nominees.

The rumours of Kumar, who turned 75 earlier this month, being one of the candidates of JD(U), surfaced a day after the party had announced that his son Nishant would be making a belated entry into politics.

Earlier, there were speculations that the reclusive Nishant, who is in his late 40s and is yet to be formally inducted into the JD(U), could be sent straight to the Rajya Sabha.

However, with less than 24 hours left for filling of nomination papers, several media outlets ran reports claiming that the chief minister, who has been at the helm since 2005, could choose the Rajya Sabha route to make an "honourable exit".

According to these unconfirmed reports, the BJP, which has been outperforming the JD(U) in elections, will have its own CM in the only Hindi heartland state where the highest seat of power has eluded it.

These reports also suggested that as a bargain, Kumar could settle for the deputy CM's post for his son.

When Giriraj Singh, who represents Begusarai Lok Sabha seat in the state, was approached with queries, he said, "Today is Holi. Such pranks are common on the occasion. Nitish Kumar ji is the chief minister".

JD(U) MLC Sanjay Kumar alias Gandhi ji, a close aide of the party supremo, reacted with bewilderment when his response was sought to the rumours.

"We have no information about who will be the Rajya Sabha candidates of the party. There is an impression that Union minister Ram Nath Thakur may retain his seat, but that is also not official. As regards the other seat, it is a decision to be taken by the chief minister, who is known to reveal his cards at the eleventh hour. We cannot say anything on the reports in the media," he said.