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Why is an airplane fuel tank vented to the outside?

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  1. To maintain tank pressure
  2. To cool the magnetos
  3. To measure fuel octane

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References

  1. FAA Pilot's Handbook of Aeronautical Knowledge, Chapter 7 www.faa.gov/sites/faa.gov/files/09_phak_ch7.pdf Checked 2026-10-09.

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