"The vast majority of the suppliers that responded to our request set forth data only with respect to that supplier’s overall 3TG sourcing, without specifying the origin of the 3TG used in Components actually supplied to Boeing. Therefore, the RCOI did not provide us with sufficient information to determine the source of the 3TG in our products. Accordingly, we conducted due diligence on the source and chain of custody of 3TG in our products."