Poland's national airline LOT will seek compensation from Boeing Co. after most of the maker’s flagship 787 Dreamliner passenger jets were grounded due to battery-related problems, LOT's deputy chief Tomasz Balcerzak told a news conference on Thursday.

The US and European aviation agencies said planes should be grounded while safety checks are carried out on their lithium ion batteries.They are worried that the batteries could leak, corroding vital equipment and potentially causing fires.

"All elements and irregularities that generate cost mean that we will file for compensation in due time", Balcerzak said.

Poland's Lot Airlines, the only European airline currently flying Dreamliners, was due to launch its 787 transatlantic service this week, but cancelled a return flight from Chicago to Warsaw on Wednesday.
LOT has three more 787s to be delivered by end of March.

" We will condition Dreamliner deliveries on the removal of the technical blips and eventual dangers", Balcerzak said.