FAA AMT Airframe Practice Exam 2025 – All-in-One Study Guide to Master Aviation Maintenance Technician Certification!

The primary purpose of an aircraft's fuel jettison system is to quickly achieve a lower landing weight in the event of an emergency or situation where the aircraft needs to land immediately. By jettisoning fuel, the aircraft reduces its weight, allowing for a safer landing with a weight that is within the safe limits of the aircraft's structure. This is particularly important in situations where an aircraft may need to land shortly after taking off with a full fuel load.

Options A, B, and D are incorrect:

A. Balancing fuel levels in tanks is usually done through fuel transfer systems rather than the fuel jettison system.

B. Emergency fire suppression systems are designed for extinguishing fires onboard the aircraft and are separate from the fuel jettison system.

D. Refueling in mid-air is typically done using specialized systems such as air-to-air refueling systems and not through the fuel jettison system.