Washington: Boeing CEO Dave Calhoun will step down by year-end, in a broad management shakeup brought on by the planemaker’s sprawling safety crisis stemming from a January mid-air panel blowout on a 737 MAX plane. The planemaker also said that Stan Deal, Boeing Commercial Airplanes President and CEO, would retire, and Stephanie Pope would lead that business. Steve Mollenkopf has been appointed the new chair of the board.Washington: Boeing CEO Dave Calhoun will step down by year-end, in a broad management shakeup brought on by the planemaker’s sprawling safety crisis stemming from a January mid-air panel blowout on a 737 MAX plane. The planemaker also said that Stan Deal, Boeing Commercial Airplanes President and CEO, would retire, and Stephanie Pope would lead that business. Steve Mollenkopf has been appointed the new chair of the board.