Boeing shares turned lower following the news.
The tests will be conducted in a Boeing simulator in Seattle.
The subpoenas will be issued to the two biggest U.S. operators of the jet over the next couple of days, the lawyers separately told Reuters.
The Max jets were grounded in March after being involved in two crashes within a five-month period.
Boeing's board takes action amid the Max jet crisis.
The report also questioned the limited number of workers at the FAA who were overseeing certification tasks.
Carriers have seven days to conduct inspections.
A pickle fork is the part that helps attach a plane's fuselage to the wing.
Boeing reported the first sale of its 737 since the airplane was grounded following two deadly crashes.
Billionaire Richard Branson gets big investment from Boeing.
The European planemaker says it sold 41 jets in the month and won a total of 303 orders in the first nine months of the year.
Tensions mount between Boeing and Southwest pilots.
Boeing's 737 Max jetliners remain grounded after two fatal crashes.
The company’s chief engineer of the commercial airplane division and its chief pilot for the 737 will join Muilenburg on Oct. 30.
The National Transportation Safety Board issued several recommendations Thursday.
Questions about safety oversight at the FAA have been raised following the two deadly 737 Max crashes.
Investors taking the final week of the month in stride.
The FAA declined to say how its updated anti-stall software performed.
Dickson took over in August as the new head of the FAA.
Boeing committee to recommend safety changes to board of directors.