As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
S-64F MAIN ROTOR HEAD HINGE PINS DO OCCASIONALLY CRACK FROM DAMPER NUT SAFETY HOLES (APPROX. 15 PERCENT OF THE TIME), BUT TYPICALLY THE CRACKS TRAVEL OUTBOARD TO THE EDGE OF THE HINGE PIN. HINGE PIN SN A041-00236 CRACKED INBOARD THROUGH THE THREADS INTO THE THREAD RELIEF AND STARTED AROUND THE HINGE PIN. APPROXIMATE LENGTH OF CRACK AROUND THE THREAD RELIEF IS .60 INCHES.