WICHITA, Kan. (AP) — Three former workers at the Boeing plant in Wichita who filed a whistleblower lawsuit against the aircraft maker and one of its suppliers failed to show Boeing defrauded the U.S. government in a $1.6 billion contract, a federal judge ruled Wednesday.

U.S. District Judge Monti Belot summarily ruled in favor of Boeing and California-based supplier Ducommun Inc., rejecting all claims brought by former employees Taylor Smith, Jeannine Prewitt and James Ailes.