  This study addresses the growing standardization of airline fleets,
highlighting that frequent passengers are more likely to fly on the same
aircraft model more often. The objective is to analyze the fleet management of
airlines and the impact of a reduced variety of models on company operations.
The benefits of standardization, such as operational efficiency, and the risks,
such as vulnerability to specific model failures, are discussed. The work
reviews international scientific literature on the subject, identifying
consensus and disagreements that suggest areas for future research. It also
includes a study on the Brazilian market, examining how standardization affects
operational costs and profitability in terms of model, family, and aircraft
manufacturer. Furthermore, the relationship between fleet standardization and
the business model of the companies is investigated, concluding that the
advantages of standardization are not exclusive to low-cost companies but can
also be leveraged by other airlines.
