What is the main goal of using Flex thrust?

The primary goal of using Flex thrust is to save engine life and decrease fuel burn. Flex thrust allows pilots to use reduced thrust settings during takeoff, specifically in situations where full power is not necessary. This approach benefits the engine by reducing wear and tear, hence extending its lifespan. Additionally, using reduced thrust settings decreases fuel consumption, resulting in cost savings for airlines and contributing to overall operational efficiency.

This practice is particularly advantageous in scenarios where the aircraft is not fully loaded or when the runway conditions are conducive to a safe takeoff with less power. It strikes a balance between performance requirements and economic efficiency, which is critical in modern aviation operations.