Preliminary NTSB report on Boeing 737 Max 9 Alaska Airlines flight finds missing bolts led to mid-air door blowout

CBS News - For more and to sign up click here Four bolts meant to hold the Boeing 737 Max 9 door plug in place were missing last month when part of a plane blew out on an Alaska Airlines flight, the National Transportation Safety Board found in a preliminary report released on Tuesday. The door plug, which covers an unused exit door, is typically secured with four bolts to prevent it from moving vertically,…