The head of Boeing Co.’s commercial aircraft business rescinded her additional title of chief operating officer, a designation she gained little over two years ago as part of a succession plan that unraveled when the planemaker went through a year of crisis.

Boeing commercial airplanes head Stephanie Pope will focus on the recovery of the company's crucial and challenged plane-making unit under a reorganization that ends her role as the company's chief operating officer but leaves her as the No.