What is the altitude threshold for reducing the output of the main generator to 25 KVA?

The altitude threshold for reducing the output of the main generator to 25 KVA is indeed 35,000 feet. At this altitude, the performance of the generator must be adjusted due to the decrease in air density, which can affect cooling and electrical output capability. By reducing the generator's output, the aircraft ensures optimal performance and reliability of the electrical systems at high altitudes, where the aircraft operates with lower atmospheric pressure and temperature conditions. Understanding this limitation is crucial for flight operations to ensure the systems remain functional within safe parameters as altitude increases, thereby enhancing safety and efficiency during flight.