What was found
CRACKED INTERCOSTAL AT PASSENGER CABIN BS500D+6 BL0 WL208.<[01] REMOVED PASSENGER CABIN UPPER ANGLE INTERCOSTAL FROM BS500D - BS420; BL 0; PER SRM 51-40-02-0G-0.<BR>RECEIVED FROM TOOL ROOM NEW INTERCOSTAL UPPER ANGLE P/N 143A5410-170; LOCATED AND DRILL PER SRM 51-40-05-0G-0 AND BOEING DWG. 143A5400; OK TO INSTALL NEW ANGLE.;[02] UPON FURTHER INVESTIGATION FOUND CRACK TO BE IN UPPER ANGLE INTERCOSTAL.<BR>REMOVED PASSENGER CABIN UPPER ANGLE INTERCOSTAL FROM BS500D - BS420; BL 0; PER SRM 51-40-02-0G-0.<BR>RECEIVED FROM TOOL ROOM NEW INTERCOSTAL UPPER ANGLE P/N 143A5410-170; LOCATED AND DRILL PER SRM 51-40-05-0G-0 AND BOEING DWG. 143A5400; OK TO INSTALL NEW ANGLE.;[03] VERIFIED CORRETIVE ACTION STEPS 1&2; OK TO INSTALL GIVEN;[04] CORRECTIVE ACTION ON STEP 2. REMOVED PASSENGER CABIN UPPER ANGLE INTERCOSTAL FROM BS500D - BS520; BL 0; WL208 PER SRM 51-40-02-0G-0.;[05] INSTALLED PASSENGER CABIN UPPER ANGLE INTERCOSTAL FROM BS500D - BS520; BL 0; WL208 PER SRM 51-40-02-0G-0 AND BOEING DWG. 143A5400.;[06] VERIFIED CORRECTIVE ACTION 5.