Federal investigators have not determined whether the bolts were installed on the 737 Max that flew on the Alaska flight.

Federal investigators have not determined whether the bolts were installed on the 737 Max that flew on the Alaska flight.

Shelby Dauber/Bloomberg/Getty Images Spirit Aerosystems offices in Farmers Branch, Texas. Washington CNN — Investigators are investigating why a part of the Boeing 737 Max 9 It exploded mid-flight It has yet to be determined whether the bolt was attached to that piece of aircraft earlier this month. National Transportation Safety Board Chairwoman Jennifer Homandy told…

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