Poland’s national airlines,LOT Polish Airlines ASA, has told The Boeing Co. (NYSE: BA) that the U.S. maker of the 787 Dreamliner has until the end of 2013 to settle damage claims related to faults with the aircraft or LOT will see Boeing in court. The airlines said yesterday that it was forced to ground all five of its new Dreamliners after discovering that low-pressure fuel filters were not in place on the Rolls-Royce engines of two of LOT’s planes.

The airline’s planes were grounded earlier this year due a battery malfunction on 787s that affected many carriers. The Polish government has already claimed about $30 million in compensation from Boeing for the earlier problems. The cost related to grounding the planes for this latest problem will be added to that.

A Boeing spokesman is cited by Reuters as saying that no other 787s in the worldwide fleet is affected by missing fuel filters and that the company is investigating the cause of the problem and how to ensure that it is not repeated.

LOT has taken delivery of five of the eight Dreamliners it has ordered. The airline calls Boeing “our very important partner,” but there appears to be a limit to its patience.

Boeing shares closed at $119.38 on Thursday, up 0.7% in a 52-week range of $69.18 to $120.38.

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