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SEATTLE (Reuters) - Boeing Co said on Thursday that production lines will not “pulse” or move airframes forward for three days next week at its 737 factory to allow workers to catch up on work that was previously delayed.

Boeing said it was using “buffer days” already generally built into its production schedule to “help us recover from the impact of the winter storms and supplier delays,” though it comes as its 737 MAX feet has been grounded worldwide in the wake of two recent crashes in five months.