As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING ROUTINE C CHECK INSPECTION, CORROSION WAS DETECTED ON INTERCOSTAL AT FUSELAGE STATION 8 LONGERON 35 RIGHT. REPAIR ACCOMPLISHED REMOVAL OF INTERCOSTAL, FABRICATION AND INSTALLATION AN NEW INTERCOSTAL IN ACCORDANCE WITH DOUGLAS DRAWING 5615530 AND ENINEERING ORDER 53-DC8-1779.