Where an airlines’ employees sued over the air carriers’ use of biometric data, the suit belonged before an adjustment board under Railway Labor Act.The 7th U.S. Circuit Court of Appeals affirmed and vacated consolidated appeals from decisions by U.S. District Judges Marvin E. Aspen and Virginia M. Kendall.Both Southwest Airlines and United Airlines maintain timekeeping systems that require workers to clock in and out with their fingerprints.Several plaintiffs sued each airline, arguing that the air carriers …