FAA AMT (Aviation Maintenance Technician) Airframe Practice Exam

Question: 1 / 1030

Aside from an external leak in the line, what will cause parking brakes to creep continually to the OFF position?

Worn brake pads.

Low brake fluid levels.

An internal leak in the master cylinder.

An internal leak in the master cylinder will cause parking brakes to continually creep to the OFF position. This occurs because the internal leak allows fluid to bypass the normal seals and pistons within the master cylinder, causing a loss of pressure in the brake system. This loss of pressure leads to the parking brakes not being able to maintain their set position, resulting in them creeping back to the OFF position. Worn brake pads (Choice A), low brake fluid levels (Choice B), and a faulty parking brake switch (Choice D) do not directly cause the parking brakes to creep continually to the OFF position, making them incorrect choices for this question.

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Faulty parking brake switch.

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