NTSB sanctions Boeing for sharing unauthorized Alaska 1282 information during pre-air show briefing
What prompted the NTSB's rebuke of Boeing?

The NTSB's rebuke of Boeing was prompted by a Boeing executive sharing non-public details of the ongoing investigation into Alaska Airlines flight 1282 door plug blow-out during a media briefing. This violated the party status agreement Boeing signed with the NTSB, which prohibited sharing non-public information and providing analysis of factual information5.
What actions will the NTSB take following Boeing's unauthorized information release?

The NTSB will sanction Boeing for disclosing non-public details of an investigation into the 737 Max 9 door panel that blew out in mid-air. Boeing will retain its party status but will no longer have access to the investigative information the NTSB produces as it develops the factual record of the accident6. The NTSB will also subpoena Boeing to appear at an investigative hearing into the case scheduled for August 6 and 7 in Washington D.C. Unlike other parties in the hearing, Boeing will not be allowed to ask questions of other participants.
What are the consequences of Boeing's actions on the Alaska 1282 investigation?

Boeing's unauthorized release of information and analysis during a media event has led to consequences in the Alaska 1282 investigation. The National Transportation Safety Board (NTSB) has removed Boeing's access to the docket of information gathered through the investigation, and Boeing will be subpoenaed for any relevant records4. The company will not be allowed to ask questions of witnesses at the planned August hearing into the accident. Additionally, the NTSB will coordinate with the U.S. Department of Justice to provide details about Boeing's unauthorized information releases.