Airframe Systems & Components Flashcards

What type of corrosion appears as a white or gray powdery deposit on aluminum aircraft surfaces?

Answer: Surface oxidation corrosion

Surface oxidation on aluminum produces a white or gray powdery aluminum oxide deposit on the metal's surface.

In a hydraulic system, what is the purpose of a hydraulic fuse?

Answer: To automatically shut off flow if a downstream rupture occurs

A hydraulic fuse automatically closes to stop fluid flow when it detects a flow rate that indicates a line rupture downstream.

Which type of aircraft skin joint allows thermal expansion while maintaining structural integrity?

Answer: Joggle joint

A joggle joint offsets one piece of skin to allow overlap without creating a raised seam, accommodating thermal expansion.

What is the minimum bend radius requirement primarily intended to prevent in sheet metal work?

Answer: Cracking on the outside of the bend

Minimum bend radius prevents tensile cracking on the outer surface of the bend where metal is stretched most severely.

An aircraft's angle of incidence is defined as the angle between the wing chord line and the:

Answer: Longitudinal axis of the fuselage

Angle of incidence is the fixed angle between the wing chord line and the aircraft's longitudinal axis, built into the airframe.

When inspecting a control cable for wear, what condition requires immediate cable replacement?

Answer: More than three broken wires in one cable lay

FAA standards require cable replacement when more than three broken wires are found within one cable lay length.

What is the function of a torque tube in an aircraft flight control system?

Answer: To transmit rotational force along its axis to actuate a control surface

A torque tube transmits torsional (rotational) loads along its length to drive a control surface or mechanism.