Aircraft manufacturer Boeing has eliminated hundreds of defective parts from the plane, a company quality inspector said. Maybe they’ll eventually end up in the 737 MAX.

Boeing has been under scrutiny for some time because its 737 MAX planes are showing problems. At the beginning of this year, an Alaska Airlines plane lost a door panel during flight, after which the US aviation authority intensified inspections and called on whistleblowers to come forward.

According to the whistleblower, the defective parts must be properly registered to prevent them from being used on aircraft. But he says Boeing had already removed it from its internal systems, making it unable to be properly tracked.

He also says the parts are being stored outdoors, which is not in compliance with regulations. When Aviation Authority inspectors announced that they would visit the site, employees quickly moved the parts to other locations.

The whistleblower accusation is now public with a hearing set to take place with Boeing CEO Dave Calhoun later tonight. He will be questioned by an investigation committee about the company’s safety culture.

Other stories from whistleblowers will also be discussed at that hearing. For example, last month, an employee at Spirit AeroSystems, the company that produces fuselages for Boeing, came forward. According to him, volatile parts regularly leave factories defective. Boeing is said to have been aware of this.

He also says employees have been pressured to perform less stringent checks. “They focused not on the quality of the parts, but mainly on the financial picture and numbers,” he said.

Two fatal crashes involving 737 MAX aircraft in 2018 and 2019 killed 346 people. After the accident involving an Alaska Airlines plane earlier this year, more incidents involving Boeing aircraft have reached the media.