What was found
DURING A "C" CHECK, THE FOLLOWING DISCREPANCIES WERE NOTED: SURFACE CORROSION ON BS 720D STR 27R ON SKIN. CUT OUT DAMAGED AREA ON SKIN AT STA 720D STR 27R IAW B727 SRM 53-30-3 FIG 3 4 3/4 BY 4". FABRICATED AND INSTALLED REPAIR DOUBLER IAW B727 SRM 53-30-3 FIG 3 MATERIAL USED DBIR .125 2024 T3 14.5 BY 12.5 PO NR 9005400, FILLERS .100 2024 T3 4" BY 1" .75 BY 2.0 PO NR 9005138 ALL PARTS AND AREA TREATED AND PRIMED IAW B727 SRM 51-10-2.