What was found
DEN - DURING C-3 CHECK, INSPECTION REPORTED CORROSION ON INTERCOSTAL AT STATION 312, BETWEEN LBL 40 AND RBL 40. MAINTENANCE REMOVED CORROSION FROM UPPER CHORD, FABRICATED AND INSTALLED REPLACEMENT UPPER CHORD PER SRM 51-10-1, FIG 1 AND SRM 53-10-9 FIG 5. (M)