Kobe Steel has delivered material with falsified certificates to ~500 companies, including Boeing

Kobe has said some 500 companies worldwide are in a supply chain tainted by admissions that it falsified certifications on the strength and durability of metals going back to 2007, including automotive giants Ford Motor Co. and General Motors Co. and the U.S.’s biggest plane maker, Boeing Co. The besieged Japanese company said in a statement it can’t yet quantify the impact of the crisis on its earnings.

https://www.bloomberg.com/news/articles/2017-10-17/kobe-steel-is-said-to-have-likely-faked-data-for-over-a-decade

http://money.cnn.com/2017/10/16/news/companies/kobe-steel-scandal-what-we-know/index.html

https://www.nytimes.com/2017/10/17/business/kobe-steel-justice-department.html