45-year-old Joshua Dean, a former mechanical engineer and quality auditor from Wichita, Kansas, alleged that Spirit leadership ignored manufacturing defects on the 737 MAX, including 'mechanics improperly drilling holes in the aft pressure bulkhead of the MAX.' When he brought this up with management, he said that nothing was done about it. So he filed a safety complaint with the FAA - and said that Spirit had used him as a scapegoat while they lied to the agency about the defects.

"After I was fired, Spirit AeroSystems [initially] did nothing to inform the FAA, and the public" regarding the bulkhead defects, said Dean in his complaint.

In November, the FAA suggested to Dean in a letter that his claims had merit, writing "The investigation determined that your allegations were appropriately addressed under an FAA-approved safety program," adding "However, due to the privacy provisions of those programs, specific details cannot be released."

Dean also gave a deposition in a Spirit shareholder lawsuit.

The shareholder lawsuit alleging that Spirit management withheld information on the quality flaws and harmed stockholders was filed in December. Supporting the suit, Dean provided a deposition detailing his allegations.

After a panel blew off a Boeing 737 MAX plane in January, bringing new attention to the quality lapses at Spirit, one of Dean's former Spirit colleagues confirmed some of Dean's allegations. -Seattle Times

He had been in good health, and 'was noted for having a healthy lifestyle,' according to the report.

He had been in critical condition for two weeks, according to his aunt Carol Parsons, who said he became ill and went to the hospital due to breathing difficulties. He was intubated, after which he developed pneumonia and then MRSA, a serious bacterial infection.