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Aircraft systems and instrumentsQuestion 635 of 934

The engine temperature is high and the airplane has cowl flaps. What should the pilot do?

  1. Close the cowl flaps to restrict the air flow
  2. Leave the cowl flaps in the same position and lean the mixture
  3. Close the cowl flaps and reduce airspeed
  4. Open the cowl flaps to allow more air flow
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Correct answer: Open the cowl flaps to allow more air flow

Open cowl flaps let a greater flow of air through the system and decrease the engine temperature.

Source: Pilot's Handbook of Aeronautical Knowledge (FAA-H-8083-25C), Chapter 7: Aircraft Systems — Engine Cooling Systems, page 178

Practice aircraft systems and instruments

Questions last reviewed: 18 October 2026