$($b$)$ Simplified

Figure $3.$ Flight load levels for the studied transport aircraft.

Table $1.$ Ocurrences of remote stress levels in the longeron for a single flight.

Stress in MPa.

With the provided information, determine:

a$)$ The equation $S_{eq}=A{N}^b$ to represent the general fatigue equation for the component, applying the Walker

correction for the mean stress. Graph the results and determine the parameter $,$ considering $S_{eq}=S_{\text{m}\text{a}\text{x}}(1-R{)}^{}.$

b$)$ What is the operational life of this component, based on safe$-$life approach with a scatter factor of $4$ in life?