As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 PYLON O/B SIDE LOAD FITTING I/B BOLT HAD CRACK INDICATION. *S/D* BOLT MATERIAL IS H11 STEEL AND CRACK IS THE RESULT OF STRESS CORROSION, A CHARACTERISTIC OF H11 MATERIAL. INCONEL 718 BOLTS WERE INSTALLED PER PROCEDURES OUTLINED IN BOEING SERVICE BULLETIN 767-57A0074, PART 3. FASTENER REPLACEMENT.