FAA AMT (Aviation Maintenance Technician) Airframe Practice Exam

How can leaks be located if a static pressure system check reveals excessive leakage?

1. By visually inspecting all external surfaces

2. By using a smoke generator

3. By isolating portions of the line and testing each systematically, starting at the instrument connections

4. By over-pressurizing the system and listening for leaks

The correct answer is: By isolating portions of the line and testing each systematically, starting at the instrument connections

If a static pressure system check reveals excessive leakage, the most effective method to locate leaks is by isolating portions of the line and testing each systematically, starting at the instrument connections. This method allows maintenance technicians to pinpoint the exact location of the leak by systematically eliminating sections of the line where the leak is not present. This systematic approach ensures a thorough inspection without missing any potential leak points. Option A, visually inspecting all external surfaces, may not always reveal internal leaks or pinpoint the exact location of the leak within the system. Option B, using a smoke generator, can be effective in some situations but may not be as precise or systematic as isolating portions of the line and testing each section. Option D, over-pressurizing the system and listening for leaks, can be dangerous and may not provide a precise location for the leaks. Therefore, option C is the most suitable and effective method for locating leaks in a static pressure system with excessive leakage.