FAA AMT (Aviation Maintenance Technician) Airframe Practice Exam

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Prepare for the FAA AMT Airframe Exam with our comprehensive quiz. This resource offers multiple-choice questions designed to enhance your knowledge and understanding of aviation maintenance concepts.

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

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What is used during the static system leakage check required by FAR Section 91.411?

  1. Positive pressure

  2. Negative pressure

  3. Electrical signals

  4. Hydraulic fluid

The correct answer is: Negative pressure

Static system leakage check is a procedure required by FAR Section 91.411 to ensure the integrity and accuracy of aircraft's altimeter, airspeed indicator, vertical speed indicator, and altimeter setting instrument. It involves pressurizing the aircraft's static system while the pitot-static instruments are read to determine if there are any leaks. Positive pressure (choice A) is not used because it is used to test the pitot tubes, not the static system. Electrical signals (choice C) are used in testing the altimeter but not to pressurize the system. Hydraulic fluid (choice D) is used in the hydraulic system, not the static system. The correct answer, therefore, is negative pressure (choice B) as it is used to pressurize the static system during the leak check.