ARP6991: MPR Micropitting Test Method - Recommended Practice

Features

Issuing Committee: E-34 Propulsion Lubricants Committee

Scope

Content: This method is designed to evaluate the micropitting performance of currently available and future aviation turbine oil formulations. Drawing on previously performed tests documented in AIR6989, the method comprises of three rings rotating against a rotating central roller configuration using the standard, commercially available PCS Instruments Micropitting Rig (MPR). A test profile has been developed between industry and academia that relies on standard, commercially available test specimens.

Rationale

Content: An industry survey determined that there is a concern over micropitting in aviation turbine bearings and gears. While there is no evidence that micropitting is associated with existing AS5780 qualified oil formulations, it is worthwhile establishing a screening method to document qualified and new candidate formulations for micropitting performance.

Meta Tags

Topics: Aircraft propulsion systems
Lubricants
Gas turbine lubricants
Engine lubrication systems
Test procedures

Details

DOI: https://doi.org/10.4271/ARP6991

Pages: 5

Citation: SAE International Recommended Practice, MPR Micropitting Test Method, SAE Standard ARP6991, Issued June 2023, https://doi.org/10.4271/ARP6991.

Additional Details

Publisher: SAE International

Published: May 30, 2023

Product Code: ARP6991

Content Type: Recommended Practice

Status: Current

Language: English