Last year, the 34 year old Boeing engineer, Curtis Ewbank, complained officially about shortcomings in the design and control of the Boeing 737 MAX production. According to the Seattle Times he now again has revealed severe and fundamental critics concerning this same jet in a report to a U.S. Senate committee.
Moreover, he criticizes the FAA heavily: “If the FAA was truly regulating in the public interest, it would take action against Boeing for its continued deception and gross errors in the design and production of the 737 MAX by withdrawing Boeing’s production certificate.”
See also Designfehler wie für ein Lehrbuch (German).