If the cockpit temperature control sensor detects a temperature above what threshold, the heat exchanger bypass valve closes fully?

The correct threshold for the heat exchanger bypass valve to close fully is 165 degrees Fahrenheit. This mechanism is crucial for the T-6A's thermal management system. When the cockpit temperature control sensor detects that the temperature exceeds this specified limit, the bypass valve reacts to ensure that the cockpit remains within a safe and operationally effective temperature range.

By closing the bypass valve, the system directs more airflow through the heat exchanger to cool the cockpit temperature effectively. This function is essential for maintaining pilot comfort and ensuring optimal performance of the cockpit instruments, which can be adversely affected by excessive heat. Understanding this threshold helps in recognizing how critical thermal management is in aircraft safety and effectiveness.

In contrast, temperatures below this threshold do not trigger the bypass valve to close, resulting in a different airflow pattern that may allow for warmer air to circulate in the cockpit if needed.