As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NUMBER ONE PYLON INBOARD STRUT SPRING BEAM FUSE PIN MIGRATED OUT OF POSITION. *S/D* EXISTING FUSE PIN AND NUT REMOVED AND REPLACED WITH NEW PARTS. ANALYSIS OF REMOVED FUSE PIN AND NUT DID NOT REVEAL ANY DISCREPANCIES. PARTS SENT TO BOEING FOR FURTHER ANALYSIS. FUSE PIN (P/N 310U2301-120).