What was found
DURING SCHEDULED INSP, NOTED CORRODED STEEL DOUBLER INSTALLED UNDER 13R STRINGER AFT OF FS 557.5 AFT PRESSURE BULKHEAD FRAME. STEEL DOUBLERS OR SHIMS NOT TYPICALLY INSTALLED, THIS LOCATION, NOT NOTED IN IPC OR SRM. INSTALLATION INFORMATION NOT AVAILABLE FROM OPERATOR. REMOVED AREA OF STRINGER 13R AS REQUIRED FOR REPAIR ACCESS AND REMOVED STEEL DOUBLER. VISUAL INSP OF AREA FOR CRACKING, EXCESSIVE STRINGER INSTALLATION GAP, ETC. OK. REPAIRED CORROSION AS REQUIRED AND INSTALLED SPRINGER SPLICE REPAIR IAW 1900 SERIES SRM 51-70-01.