KING 5 Investigators have obtained a never-seen-before document that could shed new light on what contributed to a 2019 Ethiopian Airlines Boeing jet crash that killed everyone on board. The lead Ethiopian investigators say they never saw this document. Ed Pierson spent three years at Boeing’s Renton plant as part of his 10-year career as a senior manager. After he left, he went from internal whistleblower to well-known public critic of the company, telling Congress about glaring problems on the 737 MAX production floor. He said a newly leaked document from a current Boeing employee proves what he’s been saying all along-- that despite Boeing’s denial, the company had production problems years ago that could have contributed to the Ethiopian MAX crash in 2019. Read more: https://www.king5.com/article/news/investigations/investigators/newly-leaked-boeing-document-ethiopian-airlines-737-max-crash/281-7669b39b-6676-44be-a015-030f3e3cc877