Which color indicates mineral-based hydraulic fluid?

The color that indicates mineral-based hydraulic fluid is red. This specific color coding is widely recognized in the aviation industry. Red mineral-based hydraulic fluids are commonly used due to their properties, which include good lubricating qualities, a high flash point, and resistance to corrosion.

The aviation regulatory authorities have established these color codes to ensure that maintenance personnel can quickly and accurately identify the type of hydraulic fluid in use. Using the appropriate fluid is crucial for the safe and efficient operation of hydraulic systems in aircraft.

Other colors, such as green, yellow, and blue, are associated with different types of hydraulic fluids or fluid properties. Understanding these color codes helps in the proper maintenance and refilling of hydraulic fluid systems, minimizing the risk of accidents or operational failures.