What does the sight gauge indicate when it is silver?

The sight gauge being silver indicates that the AMAD (Airframe Mounted Accessory Drive) oil needs servicing. This color is a specific signal used in the Super Hornet's maintenance and operational protocols to alert the flight crew and maintenance personnel that the oil level is below the minimum required threshold for optimal operation. Proper servicing of the AMAD oil is crucial for maintaining the hydraulic systems and ensuring the reliability and safety of the aircraft's operations. Monitoring and addressing AMAD oil levels helps prevent potential mechanical failures that could arise from inadequate lubrication and cooling, thereby ensuring the aircraft remains operationally ready and safe for flight.