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Aeromedical factorsQuestion 895 of 934

A pilot has symptoms of altitude-induced DCS. What should the pilot do first?

  1. Put on the oxygen mask and select 100 percent oxygen
  2. Begin a slow climb to relieve the pain
  3. Move the painful joint to work out the pain
  4. Fly on to the destination airport at the same altitude
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Correct answer: Put on the oxygen mask and select 100 percent oxygen

The pilot then begins an emergency descent, lands as soon as possible, and seeks medical help.

Source: Pilot's Handbook of Aeronautical Knowledge (FAA-H-8083-25C), Chapter 17: Aeromedical Factors — Altitude-Induced Decompression Sickness (DCS), page 440

Practice aeromedical factors

Questions last reviewed: 18 October 2026