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.

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A pilot reports the right brake on an aircraft is spongy when the brake pedal is depressed in a normal manner. The probable cause is?

  1. A leak in the brake fluid reservoir.

  2. Worn brake pads.

  3. Air in the brake hydraulic system.

  4. Faulty brake pedal.

The correct answer is: Air in the brake hydraulic system.

When a pilot reports that the right brake on an aircraft is spongy when the brake pedal is pressed, the probable cause is air in the brake hydraulic system. Air in the brake system can cause a spongy feeling when applying the brakes because air is compressible unlike hydraulic fluid, which is not compressible. This results in a loss of efficiency in the brake system, making the brakes feel spongy or less responsive. Option A (A leak in the brake fluid reservoir) is incorrect because a leak in the reservoir would typically result in a loss of brake fluid, not air in the system. Option B (Worn brake pads) is incorrect because worn brake pads would not cause a spongy feeling in the brake pedal; instead, they would lead to reduced braking effectiveness. Option D (Faulty brake pedal) is incorrect because a faulty brake pedal would cause issues with the control or movement of the pedal itself, rather than causing a spongy feeling in the brakes.