What key component was added after GTC-83?

The addition of the Air Oil Separator after the GTC-83 signifies an important development in gas turbine technology. The Air Oil Separator plays a crucial role in separating air from oil that might be mixed within the system, thereby ensuring that the oil used in lubrication and cooling does not carry unwanted contaminants or excess air. This component enhances the overall efficiency and reliability of the turbine's operation.

Its presence contributes to improved system performance by ensuring that the oil remains clean and aerated, reducing the risk of cavitation and other issues that can arise from contaminated oil. The Air Oil Separator also assists in maintaining optimal operating conditions, allowing the gas turbine system to function more effectively and with less maintenance over time.

While the other components listed, such as the Filter Separator, Purge Valve, and Fuel Pump, are indeed important in the overall design and function of gas turbine systems, they do not represent the significant addition that the Air Oil Separator does in relation to the advancements made post GTC-83.