As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INSPECTION C-CHECK AND SI EVIDENCE OF SURFACE CORROSION BETWEEN FUSELAGE SKIN AND STRINGER 4R AT BS 990 AT INTERIOR AREA OF FUSELAGE. AREA DERIVATED IAW SRM 51-30-02. CORROSION REMOVED IAW SRM 51-10-01 SE E NRC 100274 FOR REPAIR DETAILS.