A second whistleblower who spoke out about the manufacturer ignoring production defects passed away suddenly this week just two months after a first whistleblower died by alleged suicide.

Joshua Dean, a former quality auditor for Boeing supplier Spirit AeroSystems died from a fast-growing mystery infection on Tuesday (U.S local time)

Dean was part of a deposition in a Spirit shareholder lawsuit and had filed a complaint with the Federal Aviation Administration alleging “serious and gross misconduct by senior quality management of the 737 production line,” the Seattle Times reported.

His aunt, Carol Parsons told the Seattle Times that Dean checked himself into the hospital after experiencing breathing difficulties.

By 21 April he was reported to be in a ‘very critical condition’ with doctors revealing Dean had also suffered a stroke and that considerations were made to amputate his hands and feet which had turned black.

In March, John Barnett who had worked at Boeing for over 30 years died of an alleged self-inflicted wound and was found in his car.