Boeing admitted that its production cannot keep up with its aircraft sales. However, the aircraft manufacturer aims to restore jet production to the pre-crisis levels it achieved before deadly crashes in 2018 and 2019 and last year’s midflight door plug detachment.

To accomplish this, the Wall Street Journal reported that Boeing wants to empty the aircraft stored in its shadow factories. The company defines a shadow factory as a production line where mechanics and engineers fix, maintain, and update planes rather than build new ones.