As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HIGH TURBINE BLADE RETAINING RIVETS AND COLLARS APPEAR TO BE SUFFERING EROSION, CAUSING RIVET TAILS TO FALL BELOW THE .050 INCH PROTRUSION AS OUTLINED IN MFG MM. IF LEFT IN SERVICE THIS SITUATION COULD CAUSE THE HIGH TURBINE BLADES TO SHIFT AND/OR FAIL, CAUSING ENGINE FAILURE. ALL 71 RIVETS AND 71 COLLARS ARE BEING REPLACED WITH NEW.