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.
I just looked at a regular domestic Air Canada flight from Pearson to YVR… $1500 fucking dollars to catch an Airbus over a Boeing. Seems like the demand to not be on a Boeing plane is driving plane tickets into the stratosphere.
That’s just air Canada.
Their new motto: ‘We’re not happy till you’re not happy’