By Gregory Wallace and David Williams CNN
(CNN) — A United Airlines 777 leaving Hawaii in December plunged toward the ocean for 21 seconds shortly after takeoff and came within 800 feet of sea level, flight tracking data show.
Neither United nor the FAA indicated anyone was injured on United Flight 1722 on December 18.
The plunge occurred a little over a minute after takeoff, the data show.
The plane lost more than half its altitude and came within 775 feet of sea level, according to the data from FlightRadar24.
The plane gained speed as it dropped 1,425 feet from 2,200 feet before regaining its climb out of Kahului on
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