What is one function of the turbines in the CFM56-7B engine?

The turbines in the CFM56-7B engine play a critical role in driving the high-pressure compressors, which is essential for the engine's operation. In a turbofan engine like the CFM56-7B, the turbines extract energy from the high-temperature, high-pressure gases produced by the combustion process. This energy is used to rotate the compressor stages, which compress the incoming air before it enters the combustion chamber.

By driving the high-pressure compressors, the turbines help maintain the necessary airflow and pressure required for efficient combustion and overall engine performance. This function is crucial for generating the required thrust while ensuring optimal engine efficiency and performance.

Cabin pressure management, thrust generation, and fuel flow regulation involve different components and systems within the aircraft's design and operation and do not fall directly under the functionality of the turbines in this specific engine configuration.