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Since the crash of Ethiopian Airlines, all Boeing 737 MAXs have been grounded. REUTERS / Mike Blake

According to the Wall Street Journal , the preliminary findings of the Indonesian authorities incriminate the Boeing model in the air disaster that killed 189 people.

The findings of the investigators could still evolve, but according to the Wall Street Journal who had access to the report, for the Indonesian authorities, there is no doubt: problems in the design of the 737 MAX and its supervision played an important role in the Lion Air crash off the archipelago. The report, which is expected to be officially released in November, also blames the accident for a series of piloting errors and maintenance issues.

The tragedy caused the death of 189 people in October 2018. A few months later, in March, 157 people disappear in the crash of Ethiopian Airlines. Common point: both devices are Boeing 737 MAX.

► See also: Boeing 737 Max: the integrity of the regulators in question

Since then, the model is grounded. The MCAS anti-stall system was implicated by preliminary investigations into both accidents.

For now, according to the US daily, the investigators have only shared their findings with the US Aviation Authorities (FAA) and Transportation Safety (NTSB), but they list more than 100 factors in total to disaster.

The aircraft manufacturer Boeing and the FAA would be very concerned that " the final report will unduly focus on [Boeing] design errors and FAA certification, " writes The Wall Street Journal .

(with AFP)