Product Code:SAE ARP4249 Title:Bearing Corrosion Test Method Issuing Committee:E-34 Propulsion Lubricants Committee Scope: This SAE Aerospace Recommended Practice (ARP) is intended to evaluate corrosion inhibiting properties of synthetic gas turbine lubricants and gearbox oils. This ARP is a modified form of a method developed in the United Kingdom as DERD Test Method/1, Method No. 18, Issue 1 of January 1984.