Long Duration Elastomer Compatibility Method
This method evaluates elastomer compatibility by weight and volume changes of elastomer specimens in contact with synthetic turbine oils at moderate temperatures (100 to 160 C) and long durations (at least 1800 hours).
Rationale: This test method has been used historically by Snecma SA for evaluating synthetic turbine oils for approval to its commercial aircraft engine product line. SAE AS5780C includes this test method in Appendix A2 (Methods Under Development). Formalization of this method as an SAE ARP will allow the organizations qualifying oils to AS5780 to utilize a standardized method that will generate data with the goal toward moving this method into AS5780 Table 2 with limits.