As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TROUBLESHOOTING AN OIL LEAK FROM THE ECS DRIVE SHAFT . FOUND A 0.006" DEEP CIRCUMFERENTIAL GROOVE ON THE ECS DRIVE SHAFT UNDERNEATH THE LIP SEAL. FOUND MULTIPLE SCORES APPROXIMATELY 0.010" DEEP IN THE AXIAL DIRECTION. THE SHAFT HAS BEEN DEEMED UNSERVICEABLE.