The National Transportation Safety Board (NTSB) has imposed sanctions on Boeing Co. (NYSE:BA) for disclosing non-public details of an ongoing investigation into a 737 MAX mid-air emergency. The NTSB has also referred Boeing’s conduct to the Justice Department. What Happened: The NTSB stated that Boeing had “blatantly violated” the agency’s investigative regulations by sharing “non-public investigative information to the media” and speculating about potential causes of the Jan. 5 Alaska Airlines door plug blowout, Reuters reported on Thursday. The NTSB’s action further strains the relationship …