Which oil number is used in the aircraft?

The oil reference number that is used in aircraft systems, particularly for turbine engines, is MIL-PRF-23699. This specification covers the requirements for high-performance lubricating oils specifically designed for gas turbine engines. It ensures that the oil can withstand high temperatures and pressures encountered in aviation applications, while providing excellent lubricating properties to protect engine components from wear and heat degradation.

Understanding the significance of this specification is crucial for maintaining engine performance and reliability. The proper oil ensures optimal operation within the engine’s design parameters and is essential for the safety and efficiency of flight operations. Selection of compliant lubricants according to industry standards is a key responsibility of personnel involved in aircraft maintenance.