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AhaBulb: Stuff Everyone Should Know · ahabulb.com/pilot-water-in-fuel-sample

When you drain a fuel sample, where will any water show up?

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  1. Floating on top of the fuel
  2. At the bottom of the sample
  3. Mixed in evenly

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References

  1. FAA Advisory Circular 20-43C, Aircraft Fuel Control www.faa.gov/documentLibrary/media/Advisory_Circular/AC_20-43C.pdf Checked 2026-10-09.

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