In This Story BA +0.28% ALK -1.22% SPR -0.43% A year after a door plug fell off an Alaska Airlines-operated ( ALK -1.22% ) Boeing ( BA +0.28% ) 737 Max 9 mid-flight, the Federal Aviation Administration says that Boeing still has a ways to go before it regains the government’s full confidence. FAA Administrator Mike Whitaker wrote in a blog post Thursday that the planemaker hasn’t done what it needs to do lengthen its short leash. Suggested Reading Rivian stock soars after it beats sales