Aircraft systems and instrumentsQuestion 543 of 934

Which instruments are affected when a static port is blocked?

  1. The ASI only, because of the pitot tube
  2. The altimeter and the heading indicator
  3. The ASI and the turn coordinator only
  4. The ASI, the altimeter, and the VSI
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Correct answer: The ASI, the altimeter, and the VSI

A blocked pitot tube affects only the accuracy of the ASI.

Source: Pilot's Handbook of Aeronautical Knowledge (FAA-H-8083-25C), Chapter 8: Flight Instruments — Blockage of the Pitot-Static System, page 212

Practice aircraft systems and instruments

Questions last reviewed: 18 October 2026