Human Performance in Aircraft Maintenance

What is the primary function of the cornea in the eye?

Which part of the eye is responsible for adjusting the amount of light that enters?

What process allows the lens to focus on near objects?

What happens to the lens when focusing on a distant object?

How much can the iris adjust the amount of light entering the eye?

What role does the retina play in vision?

Which muscles are responsible for changing the shape of the lens?

Which factor can affect the degree of accommodation of the lens?

What is the main consequence of fatigue on human performance in an aircraft maintenance context?

What is the central component of the aircraft maintenance system?

Human Performance Limitations in Aircraft Maintenance

Human fatigue, cold temperatures, and workplace accidents can all impact physical performance.
Mental limitations like errors, limited perception, and poor judgment can impact aircraft maintenance.
Social and emotional factors also affect human performance, unlike mechanical components.
Aircraft maintenance engineers are central to aircraft safety and understanding human performance limitations is essential for safe operations.

Eye Structure and Function

The eye functions similarly to a camera, with an iris, lens, and light sensitive retina.
Light enters the eye through the cornea, passes through the iris and lens, and finally reaches the retina.
Light-sensitive cells on the retina (rods and cones) convert light into electrical impulses transmitted to the visual cortex of the brain for interpretation.
The cornea is the transparent front part of the eye responsible for about 70-80% of the eye's focusing ability.
The iris controls the amount of light entering by adjusting the size of the pupil, allowing for a 5:1 adjustment in light levels.
The lens, controlled by ciliary muscles, changes shape to fine-tune focus for near and distant objects, a process called accommodation.
Fatigue and aging can affect accommodation.
The retina contains light-sensitive receptors (rods and cones) connected to the optic nerve. The central area (fovea) contains only cones, allowing for fine detail and color perception.
Cones are color-sensitive and function in good light, enabling the human eye to distinguish about 1,000 shades of color.
Rods are located in the periphery of the retina and function in low light.

This quiz explores human performance limitations relevant to aircraft maintenance, including factors like fatigue, mental errors, and emotional influences. It emphasizes the importance of understanding these limitations for ensuring safety in aviation operations. The impact of human factors on maintenance efficiency is also highlighted.