A Latam Airlines Boeing 787 suddenly dropped 400 feet during a March incident.
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- The FAA has ordered hundreds of Boeing 787 Dreamliners to undergo inspections.
- It comes after a Latam Airlines jet suddenly dropped 400 feet in March, injuring dozens.
- Investigators found the captain's seat, which had a loose switch cover, involuntarily moved forward.
Hundreds of Boeing 787 Dreamliners will need to be inspected...