By Cindy Silviana and Fanny Potkin

JAKARTA (Reuters) – Lion Air has ended its search for the cockpit voice recorder (CVR) of its Boeing 737 MAX aircraft that crashed into the Java Sea in October, but Indonesian investigators have announced plans to launch their own probe as soon as possible.

The crash, the world's first of a Boeing Co 737 MAX aircraft and the deadliest of 2018, killed the 189 people on board.

Contact with flight JT610 was lost 13 minutes after departure on 29 October from the capital Jakarta, northbound, to the mining town of Pangkal Pinang.

The main wreck and the CVR, one of the two "black boxes", were not found during a first search. Lion Air announced in December that it was funding a research of 38 billion rupees ($ 2.64 million) with the help of the offshore refueling vessel MPV Everest.

The search with the ship is over Saturday, told Reuters Danang Mandala, spokesman for Lion Air Group.

A spokesman for the National Transport Safety Commission (KNKT) said Thursday however that the agency would start its own search for the black box as soon as possible.

The CVR is likely to contain vital clues that could give investigators an overview of the pilots' actions.

The KNKT spokesman said that negotiations with the Indonesian navy were under way to use a naval vessel to relaunch the search for the second black box as soon as possible.

"It may be as early as next week, it will not be as sophisticated as the Everest minivan (subsidized by the Lion) but will be equipped with a CVR detector and we already have a remote-controlled vehicle," said the door. – the commission's committee.

The clock turns on the acoustic pings hunt of the CVR of L3 Technologies Inc installed on the jet. There is a 90-day tag, shows the manufacturer's online brochure.

KNKT has published a preliminary report on the maintenance and training of airlines and on the reaction of a Boeing anti-stall system to a recently replaced sensor, without giving any reason for the crash.

"Although we appreciate the fact that Lion Air Group has released the MPV Everest, we are disappointed because no results have been achieved," said Anton Sahadi, close to the victim of the accident. plane, to Reuters by SMS.

"It has been a waste of money, time and a sophisticated ship … For several weeks, Lion Air has only given false promises to the families of the victims", a- he said, adding that he was not confident in the government's efforts.

The family of the Indonesian co-pilot of the theft on Friday filed a lawsuit for wrongful death against Boeing in Chicago, aggravating the dispute that was raging against the plan maker. [L1N1YX156]

The lawsuit alleges that Lion Air's Boeing 737 MAX jet was excessively dangerous, as its sensors provided inconsistent information to pilots and the aircraft.

At least two other lawsuits have been filed against Boeing in Chicago by relatives of victims.

Experts also discussed the decision of the Indonesian authorities to ask Lion Air to pay for the research that ended on Saturday.

Security experts say that air accident investigation agencies generally search for black boxes with public funding to ensure the independence of the process, and that it is unusual for this task to be assigned to one of the parties. investigation.

Indonesian investigators have previously said that administrative problems and funding problems have hindered Lion Air's search for the CVR and that they have turned to the airline for help.

In 2007, efforts to recover black boxes from a crashed Adam Air plane were delayed by disagreements between Indonesia and the airline over who should bear the costs.

(Report of Cindy Silviana & Fanny Potkin in JAKARTA, additional report of Jamie Freed in SYDNEY, edited by Nick Macfie, Tim Hepher and Himani Sarkar)