SEATTLE — After six years of work, Boeing has flown the final in-storage 737 MAX out of Moses Lake, marking the end of a grueling chapter in the company’s history.

Boeing began storing MAX planes at Moses Lake, as well as other facilities in the region, in San Antonio and in Victorville, Calif., in 2019, after two fatal MAX crashes led the Federal Aviation Administration to ground the plane. The FAA’s mandate lasted 20 months, eventually prompting Boeing to halt production of its most popular plane.

But, optimistic that the MAX would return to the skies quickly, Boeing mechanics continued building the plane in the company’s Renton factory for 10 months before the production halt, leaving Boeing with hundreds of planes in storage.

Boeing’s MAX storage inventory grew in 2020, when the COV

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