As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING ROUTINE CPCP CHECK INSPECTION, FOUND INTERGRANULAR CORROSION ON LOWER CHORD LBL 48, FS 740 FUEL TANK CENTER SECTION. INSTALLED DOUBLER REPAIR IAW EA B2-57-008 DTD 12 AUG 97 AND IAW SKETCH NR AIA/E/2608 REV A DTD 11 AUG 97. CORROSION TASK CARD NUMBER C57-174-01. NON-ROUTINE TASK CARD NUMBER 000426.