As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) FAULT CODE 939 (RGB CHIP DETECTED) RECEIVED THROUGH THE FAST SYSTEM. LAB ANALYSIS DETERMINED M50 MATERIAL WAS PRESENT. AMM FOLLOW-UP INSPECTION FOUND ADDITIONAL MATERIAL, THE ENGINE WAS REPLACED AND THE AIRCRAFT WAS SUBSEQUENTLY RELEASED FOR SERVICE. RGB WILL BE ROUTED TO THE MANUFACTURER FOR ANALYSIS/REPAIR. (TC# 20190622004)