As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT GROUNDED FOR HEAVY MAINTENANCE. CORROSION ON INTERCOSTALS AT STATION 1263-1285, STRINGER 34L-35L. INTERCOSTALS FOUND TO BE OUT OF LIMITS BETWEEN 1263-1285 STRINGER 34L-35L. INSTALLED NEW INTERCOSTALS IN ACCORDANCE WITH SRM 51-40-02.