According to CCTV news, Boeing aircraft have recently been exposed to safety issues and have been investigated by regulatory authorities, causing public concern. On the 17th local time, the US Senate Commerce Committee and expert panel members held two hearings on Boeing's safety report. At the hearing, multiple whistleblowers pointed out issues with Boeing. Among them, Boeing's quality engineer Sam Saliple stated that he had repeatedly raised concerns about aircraft manufacturing within Boeing, but they were all ignored, and he even faced threats.
Salepur stated that Boeing has a corporate culture that prioritizes production over safety. Salepur said that Boeing employees used strong pushing to complete component assembly during the assembly of the 787 aircraft fuselage, which may increase material fatigue. Salipur has repeatedly reported the situation within Boeing, but not only did it not receive attention, but it was instead retaliated, excluded, and subjected to personal threats, and was kicked out of the 787 aircraft project and transferred to the 777 aircraft project. But he also found similar assembly problems in the assembly of this model. Boeing has still not taken measures to address the issues reported by Salepor, and his supervisor even threatened after a meeting that if any other group members mentioned the issues raised by Salepor at the meeting, he would "kill" those people. Boeing denied the claim of aircraft material fatigue on the 17th and stated that the company prohibits retaliatory actions.
In addition, the Chairman of the National Transportation Safety Commission, Hormendy, wrote a letter to the US Congress in March. The letter stated that Boeing claimed that they could not find any relevant operational records, so the National Transportation Safety Board of the United States is unable to know who operated the opening, reinstallation, and closing of the Alaska Airlines crash door stopper.
Ed Pearson, former senior manager of Boeing's Renton factory, stated at a hearing on the 17th that these records exist and he has transferred them to the Federal Bureau of Investigation. Pearson said he believes Boeing's actions are covering up the crime. The National Transportation Safety Board of the United States stated on the 17th that the department has not yet received any documents from Boeing or other sources regarding the installation of door plugs.