What was found
DURING D-CHECK, LEFT HORIZONTAL RIB INNER CHORD AND ADJACENT SKIN IS CORRODED FROM BS 1342.4 TO BS 1345. CUT OUT DAMAGED AREA OF SKIN 8 INCH BY 7 INCH .063, REMOVED FASTENERS, REMOVED CORROSION ON CHORD ANGLE, MATERIAL LOSS .004 AS PER SRM 51-10-6. ALODINED AND PRIMED AS PER SRM 51-10-2. INSTALLED WEB REPAIR AS PER SRM 51-40-2, MATERIAL USED 7075-T6 8 INCH BY 7 INCH .063 AND 7075-T6 .071 8 INCH BY 4 INCH WEB SPLICE.