The fatigue life of airplanes is influenced by changes in the properties of composite materials, which add uncertainty to how these materials react to frequent application of pressure. These variances in fiber arrangement, the dispersion of resin, and the emergence of faults during manufacture can lead to differences in robustness, rigidity, and tolerance of failure, impacting the beginning and extension of fatigue cracks. Through a statistical analysis, we can evaluate this inconsistency and its impact on the fatigue life by characterizing the likelihood distribution of the materials' traits and tying them to experienced times of malfunction. This makes it possible for designers to approximate the span and probability of service without compromising realistic standards, hence providing a basis for maintaining safety limits and planning for maintenance of the airplane structures.