Former Quality Inspector Alleges Plane Defects from Boeing's Supplier

Plane bodies made by Boeing’s largest supplier regularly left the factory with serious defects, according to a former quality inspector at the firm.

Santiago Paredes who worked for Spirit AeroSystems in Kansas, told the BBC he often found up to 200 defects on parts being readied for shipping to Boeing.

He was nicknamed “showstopper” for slowing down production when he tried to tackle his concerns, he claimed.

Spirit said it “strongly disagree[d]” with the allegations.

“We are vigorously defending against his claims,” said a spokesperson for Spirit, which remains Boeing’s largest supplier.

Mr Paredes made the allegations against Spirit in an exclusive interview with the BBC and the American network CBS, in which he described what he said he experienced while working at the firm between 2010 and 2022.

He was accustomed to finding “anywhere from 50 to 100, 200” defects on fuselages – the main body of the plane – that were due to be shipped to Boeing, he said.

“I was finding a lot of missing fasteners, a lot of bent parts, sometimes even missing parts.”

Boeing declined to comment.

Spirit AeroSystems and Boeing have both come under intense scrutiny after an unused door came off a brand new 737 Max shortly after take-off in January, leaving a gaping hole in the side of the plane. According to investigators, the door had originally been fitted by Spirit, but had subsequently been removed by Boeing technicians to rectify faulty riveting.

The incident prompted the US regulator, the Federal Aviation Administration, to launch an audit of production practices at both firms. It found multiple instances where the companies failed to comply with manufacturing control practices.

Mr Paredes told the BBC that some of the defects he identified while at Spirit were minor – but others were more serious.

He also claimed he was put under pressure to be less rigorous.

“They always made a fuss about why I was finding it, why I was looking at it,” he said.

“They just wanted the product shipped out. They weren’t focused on the consequences of shipping bad fuselages. They were just focused on meeting the quotas, meeting the schedule, meeting the budget… If the numbers looked good, the state of the fuselages didn’t really matter,” he alleged.

Many of Mr Paredes’ alleged experiences at Spirit form part of his testimony in legal action that disgruntled shareholders have brought against the firm.