American aircraft manufacturer Boeing cannot get out of trouble. While there have been several reports of defects on the 737 Max 9 aircraft in recent months, there are now two new issues: the 787 Dreamliner and the 777.

The Federal Aviation Authority (FAA) opened an investigation after a whistleblower raised the alarm. Boeing engineer Sam Saleh Pour told the regulatory body that errors were made in assembling various parts of the plane. According to him, there is a risk of losing parts.

The 787 Dreamliner fuselage can become weak because mechanics use tricks to connect different parts together more quickly, Salehpour says. They do this so that they can deliver the new plane on time. Salehpour says he shared his concerns with Boeing management but they were ignored.

He also says that sometimes things went wrong when assembling the 777. If the parts didn’t fit together correctly, the problem was solved in a harsh manner. “I saw people literally jumping on parts of the plane to make sure they fit,” Salehpour told reporters.

Boeing says in its response that the accusations are baseless. “It does not reflect the work Boeing is doing to ensure the long-term quality and safety of the aircraft.” The company told Reuters it would cooperate with the FAA investigation.

This is not the first time there have been concerns about the 787 Dreamliner. Deliveries of the device to customers were halted between May 2021 and August 2022 due to several production errors. According to Boeing, there are about 1,100 Dreamliners in use worldwide.

The crisis at Boeing began in January, when an Alaska Airlines 737 Max 9 lost part of its fuselage during flight. Last month, a United Airlines 777-200 lost a wheel after take-off. Less than a day later, another United Boeing plane in Houston skidded off the runway, possibly due to brake problems. A few days later, a LATAM Airlines Dreamliner suddenly made a dive, injuring about 50 people.

The company expects significantly disappointing financial results this year. CEO Dave Calhoun decided to resign at the end of last month.