LogFAQs > #979320938

He said in some cases, sub-standard parts had even been removed from scrap bins and fitted to planes that were being built to prevent delays on the production line.
It established that the location of at least 53 "non-conforming" parts in the factory was unknown, and that they were considered lost. Boeing was ordered to take remedial action.
On the oxygen cylinders issue, the company said that in 2017 it had "identified some oxygen bottles received from the supplier that were not deploying properly". But it denied that any of them were actually fitted on aircraft.

So basically Boeing purposely sold planes that were junk and going to fall apart risking the lives of millions who travel on their planes and he blew the whistle on this and all the sudden he is found dead.