Boeing says not sure defect won't happen again at hearing on 737 MAX blowout

The U.S. National Transportation Safety Board held hearings on Tuesday and Wednesday in Washington, D.C. on the Alaska Airlines mid-air door panel blowout of a Boeing 737 MAX 9 on Jan. 5, highlighting the planemaker's faulty production work and safety practices.

Testimony by Boeing employees revealed chaos at work, saying they were pressured to do more work than they could do and cannot avoid making mistakes.