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NTSB Launches Investigation Into 777’s Sudden Loss of Altitude

The United Airlines 777 began a steep dive from around 2,200 feet to 775 feet, creating forces of nearly 2.7 times the force of gravity, according to reports.

The NTSB announced Tuesday it is opening an investigation into the December 18 incident. [Credit: Shutterstock]
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Key Takeaways:

  • The NTSB is investigating a United Airlines Boeing 777 flight that dramatically plunged from approximately 2,200 feet to 775 feet above the ocean shortly after departing Maui in December 2022 before safely recovering.
  • The steep dive and subsequent recovery, which generated forces of nearly 2.7 Gs, occurred during heavy rainfall, and United's internal review resulted in additional pilot training.
  • The NTSB launched its investigation months after the incident, which was voluntarily reported by the flight crew to the FAA, with a preliminary report expected within three weeks.
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The National Transportation Safety Board (NTSB) announced it is launching an investigation after a Boeing 777 flight en route to San Francisco from Maui dramatically plunged to an altitude of around 800 feet above the ocean before recovering.

News of the investigation comes months after the incident occurred.

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