Boeing's 737 MAX design philosophy was right, top engineers have told House investigators.

According to the WSJ and reported by Seeking Alpha, the transcripts, are part of closed-door interviews that will be part of a US government report to be released this week and stand in contrast to other company leaders' concessions of past engineering errors.

"The overall design effort was correct and appropriate," said Michael Teal, former 737 MAX chief product engineer, "but that assumption underpinning that process was proven to be incorrect."

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"Clearly what was in error was our assumptions regarding the human-machine interaction," added Keith Leverkuhn, who was vice president and general manager of the 737 MAX program.

"Because the process relied on the industry standard of pilot reaction to a particular failure. And what was clear post accidents was that assumption was incorrect."

Since the crashes, Boeing, its competitors, and regulators have dumped long-held industry assumptions about pilot training and skill levels.

READ: The 737 MAX will be one of the safest aircraft in history