Payam Javan: Three senior executives at Boeing, including CEO Dave Calhoun, are stepping down amid a growing scandal over the company’s product quality.

Calhoun called it a “watershed moment” after a door panel blew out on a 737 Max-9 flown by Alaska Airlines in January. He emphasized the need for transparency and a commitment to safety.

Larry Kellner, Boeing’s board chairman, will not seek reelection, with Steve Mollenkopf taking over. Stan Deal, CEO of Boeing Commercial Airplanes, is retiring, to be replaced by Stephanie Pope. Calhoun inherited the Boeing 737 MAX crisis and led the company through it.

The FBI is investigating the recent Alaska Airlines incident, sending letters to passengers indicating a possible crime.