How does the T-6 ensure the engine remains lubricated if the primary oil filter is compromised?

The T-6 ensures that the engine remains lubricated if the primary oil filter is compromised by activating a filter bypass valve. This mechanism is critical for maintaining engine operation and reliability. When the primary oil filter becomes clogged or fails, the filter bypass valve opens, allowing oil to flow directly to the engine without being filtered. This ensures that essential lubrication continues, which is vital for the prevention of engine seizure and damage. By maintaining oil circulation, the engine can still operate even if contaminants are present in the oil, thus providing a safety net that helps ensure operational readiness and reliability during flight.

Other options, such as shutting down the engine or increasing oil flow rate, do not address the need for continued lubrication under compromised filter conditions. A secondary filtration system may not be an immediate response to filter failure, making the bypass valve the most critical feature in this scenario.