As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT A 50-HOUR INSPECTION, FOUND LEFT ENGINE UPPER INBOARD MOUNT BRACKET P/N 643044 CRACKED AND SEPARATED .25 INCH. UPON FURTHER INVESTIGATION, DISCOVERED LOWER INBOARD MOUNT P/N 643042 CRACKED IN TWO. IT APPEARS THE LOWER MOUNT BROKE FIRST CAUSING THE UPPER MOUNT TO FAIL. SUSPECT CAUSE APPEARS TO BE METAL FATIGUE CAUSED BY ENGINE VIBRATION.