The news, first reported by the Polish Press Agency (PAP), was confirmed Tuesday by LOT's spokesman, Krzysztof Moczulski, reported news portal Notesfrompoland.com. According to PAP, the lawsuit follows months of unsuccessful efforts to negotiate a settlement.

The case relates to design flaws in the 737 MAX that led to two accidents in which almost 350 people died. As a result, the aircraft was grounded worldwide between March 2019 and November 2020, and only permitted to return to European skies in January 2021.

Earlier this year, Boeing paid over USD 2.5 billion to settle a charge of criminal conspiracy to defraud the Federal Aviation Administration. The firm admitted to criminal misconduct for misleading regulators about the safety of the 737 MAX.