As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE OVERHAUL PERFORMED ON THIS BLADE WAS NOT TO HARTZEL SPECIFICATION, AND AS A RESULT, THE BLADE HAD SOME SIGNIFICANT PROBLEMS THAT COULD HAVE RESULTED IN SAFETY OF FLIGHT ISSUES. UNABLE TO DETERMINE WHERE THE OVERHAUL WAS PERFORMED. PLEASE REFERENCE HARTZEL ENGINEERING REPORT NR 1861 FOR DETAILS OR CONTACT TOMASO DIPAOLO AT THE CHICAGO AIRCRAFT CERTIFICATION OFFICE. (X)