A Boeing 737 Max 9's fuselage door plug blew off mid-flight on an Alaska Airlines plane on Jan. 5. The following is an examination of how the fallout from the Boeing 737 Max crisis will affect shareholders:This Isn't Boeing's First GroundingBoeing has had issues with its 737 Max airplanes for several years now. How the Crisis Could Affect Boeing's StockWhile existing 737 Max 9s can still fly, the FAA is restricting Boeing's production of the aircraft. Investors in airline stocks overall shouldn't be overly concerned about the fallout from the Boeing 737 Max 9 incident. Boeing's 737 Max crisis may impact Boeing's stock price but not necessarily those of airline stocks, or the stock market as a whole, in the long run.