The Boeing Co. goes to court on Wednesday to fight a subpoena to depose one of its executives in lawsuits brought over last year’s Ethiopian Airlines crash involving its grounded 737 Max 8 aircraft.

Plaintiffs’ lawyers, representing the families of the victims of the crash, want to know why Boeing produced certain discovery materials to Congress but not to them. They originally scheduled a Feb. 18 videotaped deposition but held off after Boeing brought a motion to quash the subpoena, insisting that plaintiffs’ attorneys received the same information that Congress did, and that attorney-client privilege protected decisions relating to the production of those documents.