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A modern flight data recorder must retain at least

  • A.2 hours
  • B.10 hours
  • C.25 hours of flight data
  • D.30 minutes

Answer: C

The data recorder holds a full day of operation while the voice recorder historically held only 30 minutes, later extended to two hours and now to 25 hours on new aircraft. The recording is a loop, so the oldest material is overwritten.

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