Another Boeing whistleblower has died unexpectedly as the company faces serious scrutiny over safety practices. He worked as quality auditor for Spirit AeroSystems Holdings Inc, one of Boeing’s main partners in the manufacturing of 737 aircraft. Dean is the second Boeing whistleblower to die unexpectedly after John Barnett, a former Boeing employee who raised safety concerns after being at the company for over 32 years, was found dead in March in a hotel room from self-inflicted wounds.