What is the max tolerable fuel contamination?

The maximum tolerable fuel contamination for the King Air 350 is 0.5%. This limitation is critical because higher levels of fuel contamination can impact engine performance and reliability. Clean fuel is essential for optimal engine operation, as impurities can lead to issues such as fuel filter blockage, injector fouling, or even failure of engine components. The 0.5% threshold is established to ensure that the fuel systems maintain effective operation and are safeguarded against the detrimental effects of contaminants, thus promoting safety and performance during flights. Proper fuel quality checks are essential to adhere to this limitation.