What is the altitude limit for training above which T-6A operations are prohibited?

The altitude limit for training operations in the T-6A is set at 21,000 feet. This restriction is in place to ensure the safety and effectiveness of training flights. At altitudes above this limit, various factors such as reduced air density and oxygen levels can significantly impact aircraft performance and pilot physiology. The T-6A, while capable of operating at higher altitudes, is restricted to this altitude for training to maintain optimal safety standards and prevent complications associated with higher altitude operations, like hypoxia and reduced engine performance. Therefore, understanding this operational limit is crucial for ensuring safe and effective training environments in the T-6A.