Boeing restarted production of its best-selling 737 MAX jetliner last week, about a month after the end of a seven-week strike by 33,000 factory workers, according to three sources familiar with the matter.

Boeing is resuming production of its bestselling plane, the 737 Max. It's the first time that Max jets have moved down the assembly line since September, when about 33,000 workers went on strike for higher pay.