Boeing spokesman Miles Kotay declined comment, saying the company doesn't comment on ongoing litigation. A message left at the headquarters Mach II Maintenance Friday wasn't returned.
The nine-page lawsuit, which does not specify a damages figure, a comes in the wake of a preliminary report in October from Poland's State Commission for Investigation of Air Accidents that pointed to technical problems with the plane and inadequate guidance in its cockpit handbook.
The report said the main landing-gear discharge system failed due to a broken hydraulic hose, and the backup system also failed, probably because its circuit breaker was accidentally in the off position. It also said the cockpit checklist did not include guidance on what to do with a malfunction of the alternative landing gear system or if the landing gear could not be discharged.
After the report was released, Boeing said in a statement it would not comment until the final report. It added, "Boeing is committed to the safety of our airplanes and the people who fly on them." The commission didn't say when it would issue its final report.
Such a total undercarriage failure was unprecedented for a Boeing 767 and unusual overall, according to aviation data and experts.
Follow Michael Tarm at www.twitter.com/mtarm