Boeing denied the allegations and said it investigated quality investigator Sam Mohawk’s claims and found no evidence of missing defective parts on its airplanes.

We have thousands of missing parts. And it's not just bolts but rudders, one of the primary tools for steering an airplane. Mohawk says 42 flawed or "non-conforming" rudders – that he says would ...

Building an airliner is not a simple matter, with each aircraft consisting of countless parts. This complexity means that it's nearly impossible to build these machines at just one location ...