As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(MDR05-073) FOUND CRACKED DURING NDT INSPECTION. CRACK IS APPROXIMATELY 1 INCH IN LENGTH AND IS IN THE KEY GROOVE. THIS IS FIRST KNOW DEFECT OF THIS TYPE FOR THIS PART. CAUSE IS UNKNOWN AND NO RECOMMENDATIONS TO PREVENT RECURRENCE AT THIS TIME. (K)