Boeing has been sanctioned by the National Transportation Safety Board (NTSB), after the planemaker publicly disclosed privileged information about an ongoing investigation into the blowout of a door plug aboard a 737 Max 9. 

Speaking to reporters at Boeing's Renton, Washington factory on June 25, the company speculated on the potential causes of the blowout incident, while offering new details that the NTSB had not given them permission to reveal. Two days later, the NTSB chastised Boeing for "blatantly" violating its policies on active investigations, saying the disclosure was prohibited by the agreement that Boeing signed when it was offered party status by the NTSB at the start of the investigation.

“As a party to many NTSB investigations over the past decades, few entities know the rules better than Boeing,” it said in a news release, adding that, as a result of the breach, it has now cut off Boeing's access to information regarding the investigation. The NTSB is also summoning Boeing leadership to an investigative hearing in Washington, D.C. in August into the door plug blowout, where the company now won't be permitted to question participants. 

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The NTSB plans to consult with the U.S. Department of Justice's fraud division on this latest misstep from Boeing, but did not clarify whether that would entail formal charges. 

Boeing apologized in a statement to The New York Times, admitting that it "overstepped the NTSB's role as the source of investigative investigation," and that the company "deeply" regrets its comments.