WASHINGTON — Less than a month after Boeing unveiled a new product Major changes in management While the plane maker hoped to stem the tsunami of safety concerns plaguing it, it’s clear the strategy isn’t working.

Later this year, CEO Dave Calhoun and Chairman Larry Kelner announced their departures, but that didn’t stop the trend. Indeed, the aerospace giant’s troubles are getting worse as Congress prepares to launch new investigations into its conduct.

Last week’s revelations about testing by a major Boeing supplier Vaseline, cornstarch and talc Many travelers have lost faith in it as a potential lubricant for problem door seals on 737 Max 9 jets.

Spirit AeroSystems selected “Dawn” – a popular American washing liquid – as the most effective solution.According to published reports New York Times, the company then tested the effectiveness of the door seal using hotel room key cards. Both processes are approved by Boeing and documented with the Federal Aviation Administration (FAA).

But Spirit praised its employees for finding “creative ways to make the airframe manufacturing process more efficient.”

“People see a hotel key card or Dawn soap and think it’s sloppy,” said Spirit spokesman Joe Buccino. “This is actually an innovative way to solve the problem of efficient store assistance.”

Boeing is currently facing accusations related to the construction of another model of jet: the 787 Dreamliner.Whistleblower Sam Salehpour, a quality engineer who has worked at the company for four decades, told reporters New York Times Parts of the Dreamliner were held together incorrectly.

He claimed the fault could have caused the aircraft to age prematurely and eventually disintegrate in flight.

His concerns are now the subject of an FAA investigation that could upend ongoing efforts to build and sell the fastest, widest-body planes in aviation history.

Mr. Salepour’s lawyer said the company moved him to work on Boeing 777 aircraft after he complained to management, claiming he had witnessed similar production irregularities. He reported it to the FAA in January, and at the time his attorney claimed Boeing threatened to fire him. “Despite Mr. Salipur raising known and well-substantiated issues, Boeing did not heed his warnings and instead prioritized getting the aircraft to market as quickly as possible,” the lawyers wrote in a statement.

Boeing denied Salipur’s claims and said it would continue to encourage employees to voice any concerns they had about the production process. “We are confident in the 787 Dreamliner because of the comprehensive work that has been done to ensure the aircraft’s quality and long-term safety,” the company said. It expressed similar confidence in the integrity of the 777.

There are more than 1,100 Dreamliners in service around the world. British Airways, Bought my first Dreamliner In 2013, the aircraft was described as “the mainstay of the airline’s long-haul fleet”. Air France operates 10 Dreamliners and more than 40 Boeing 777s. Both models land regularly at Heathrow, Gatwick and other UK airports with long-haul flights.

Peter Lemme, who worked on Boeing’s avionics engineering team for 16 years, claims the company’s decline began with the development of the 787. “I had the opportunity to see this firsthand,” he told the outlet I. “I work for a supplier that is making major components of the 787.

“In earlier plans, the group would have 20 or 30 Boeing engineers who would mentor suppliers…but on the 787…we were really only working with one engineer. They asked us to write the specifications for the system, and Instead of writing the spec yourself and delivering it to us.”

Mr. Lem believes Boeing is trying to shift safety responsibilities to competing suppliers to streamline the manufacturing process. “When they’re competitive, the conversation does get cold,” he said. “I think the 787 was really affected by this problem, and I think Boeing recognized after the 787 was launched that they had gone too far.”

Boeing executives face more difficult days ahead with a hearing Wednesday by the Senate Permanent Subcommittee on Investigations on Salipool’s allegations. In a letter to the companyCommittee co-chairs warned Mr Calhoun that the hearing would examine reports of “egregious and dangerous manufacturing defects ‘that are creating potentially catastrophic safety risks’”. The company said it is cooperating with congressional investigations.

For Boeing’s top executives, every week comes with trying to fill more holes in the company’s dam.

With the company’s share price crashed last week Despite falling to its lowest point in more than a year, Mr. Calhoun remains Get a 45% salary increase Last year, his annual pay was an eye-watering $31.4 million (£25.15 million).