John Barnett had worked for Boeing for 32 years, until his retirement in 2017.
In the days before his death, he had been giving evidence in a whistleblower lawsuit against the company.
Boeing said it was saddened to hear of Mr Barnett’s passing. The Charleston County coroner confirmed his death to the BBC on Monday.
It said the 62-year-old had died from a “self-inflicted” wound on 9 March and police were investigating.
The FAA has allowed this mess to continue for far too long because Boeing is an industry titan. Too big to fail. Well, maybe not anymore.
Too big to fail is a terrible concept that was invented.
If a company gets too big to the point that it’s failure is going to drag down the company. That company should be broken up to allow them to to fail. Anything else is either reward the company for making bad decisions or allow companies to become stagnant because if anything happens, the government will bail them out.
Edit: Spelling and grammar are important.