A former Boeing quality-control manager alleges that for years workers at its 787 Dreamliner factory in Everett, Washington, routinely took parts that were deemed unsuitable to fly out of an internal scrap yard and put them back on factory assembly lines .

Boeing managers used an “elaborate off-the-books practice” that involved taking parts from the company’s internal scrap yards and putting them back on the production line, despite being marked with red paint as defective.

A former Boeing inspector is alleging scrap parts were used on the assembly lines at the 787 Dreamliner Factory in Everett, Washington.