US Senator Maria Cantwell (D-Wash.) says the US Air Force contract for the next generation of refueling tankers should not be awarded until questions are answered about the military's latest snafu.
A decision on who wins the $35-billion contract is expected as early as next month.
In November, the Air Force admitted that it had inadvertently mixed up two packages of information. It sent details of Boeing's bid to Airbus-parent EADS and of EADS's bid to Boeing.