In an unprecedented Senate hearing Tuesday, Boeing’s safety practices came under intense scrutiny as lawmakers revealed that more than a dozen whistleblowers have stepped forward with concerns about the aircraft manufacturer’s operations.

Senator Richard Blumenthal disclosed the scale of internal dissent during the hearing, confirming that “more than a dozen whistleblowers” have now come forward. A comprehensive committee staff memo, spanning over 200 pages, details allegations from industry insiders with direct knowledge of Boeing’s manufacturing practices and policies.

The testimony arrives at a critical moment for Boeing, following a series of high-profile safety incidents, including the recent mid-air loss of a fuselage panel on a 737 MAX aircraft. CEO David Calhoun, appearing before Congress for the first time in his tenure, faced rigorous questioning from both Republican and Democratic senators about the company’s safety culture and manufacturing standards.

The Federal Aviation Administration has also acknowledged its role in Boeing’s safety challenges. FAA Administrator Mike Whitaker recently conceded before the Senate Commerce Committee that his agency had been “too hands off” in its oversight of the manufacturer. Senator Maria Cantwell of Washington state raised particular concerns about the qualifications of FAA safety inspectors, noting instances where individuals with non-aviation safety backgrounds were tasked with critical oversight roles.

“We need an aviation inspector on the floor who has aviation experience, not just safety experience,” Senator Cantwell emphasized, citing an example of an inspector whose primary safety experience came from the dairy industry.

The hearing took on an especially poignant tone as family members of crash victims held photographs of their lost loved ones. Clariss Moore, who lost her daughter Danielle in a 737 Max crash, confronted Calhoun directly as he departed the hearing room.

Despite Boeing’s ongoing safety challenges under Calhoun’s leadership, the CEO has maintained strong support from the company’s board of directors, receiving annual compensation exceeding $20 million in salary and stock options. He is set to retire later this year with a $45 million severance package.

The Senate investigation continues to gather testimony from whistleblowers, some of whom have chosen to remain anonymous while others are preparing to speak publicly for the first time. This growing body of internal criticism suggests a deeper examination of Boeing’s manufacturing and safety protocols may be necessary to restore public confidence in the aerospace giant.

The hearing represents a significant moment of accountability for Boeing’s leadership, marking the first time Calhoun has had to answer directly to lawmakers about the company’s safety record and manufacturing practices. As investigations continue, both Boeing and the FAA face mounting pressure to demonstrate meaningful improvements in their safety oversight and manufacturing processes.