What was found
DURING HEAVY CHECK MAINTENANCE FOUND INTERIOR FUSELAGE CENTER SECTION III, STRINGER 27R CORRODED AT STR END AT FR 88, FWD OF WASTE SERVICE PAN. INTERIOR FUSELAGE CENTER SECTION III, STRINGER 27R HAS BEEN REPAIRED BETWEEN FR88 AND 85 IAW EMB SRM 53-23-03 REPAIR 6. NDT REPORTS NO CRACKS FOUND.