As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION WAS IDENTIFIED ON THE INBOARD FORWARD SURFACE OF THE REAR SPAR BULKHEAD TERMINAL FITTING. THE BOEING APPROVED REPAIR INVOLVED REMOVING BOLTS FOR ACCESS AND LIGHT BLENDING OF THE SURFACE TO REMOVE THE CORROSION PER ERA 456629-14.