What was found
INTERCOSTAL C/T STRINGER 20R, BETWEEN FRAMES AT FS310.00 AND FS319.70, BELOW AND FORWARD OF THE SERVICE DOOR LOWER SILL (WL72.50), HAS LIGHT CORROSION ON THE UPPER FACE. 319.70 HAS ELONGATED HOLE THROUGH INTERCOSTAL AND DRILL START IN STRINGER. HOLE MEASURES: .235 X .160 THROUGH INTERCOSTAL. REPAIR AND INSTALLATION OF INTERCOSTAL AND STRINGER COMPLETED IAW REO 670-53-21-2451. PERFORMED BLEND OUT OF DAMAGE TO SMOOTH CONTOUR IN 2 (EA) AREAS PER SRM 51-12-00 (20:1 TRANSITION) AND NDT PER 51-20-006 AND DETERMINED REWORKED AREAS WERE CRACK FREE PER PARAGON NDT JOB NO. A270824. FINAL REPAIR HOLE SIZE .2750" DIA. PERFORMED REPAIR STEPS 1 THRU 12. INSTALLED THE 2 (EA) MANUFACTURED FREEZE PLUGS 670-53-21-2451-1 AND -2 ON STRINGER AND INTERCOSTAL.