What was found
DURING ACCOMPLISHMENT OF AD 88-24-08 INSPECTION PER EO-12-5330-29-B1058I/R, HFEC INDICATES EXTERNAL FUSELAGE SKIN CRACK .100 AT COUNTERSINK FASTENER HOLE CONDTO FS 639 RT LONGERON 5 LOWER SHEAR TIE. REMOVED 1 FASTENER, NDT VERIFIED CRACK IN SKIN AT COUNTERSINK. CUT OUT 21/8 SKIN WERE CRACK WAS FOUND. FABBED FINGER DOUBLER REPAIR OUT OF MIL T 90641H .032 P/N 1A-33157-1. FABBED, TREATED AND PRIMED FILLER ON THE AC FS 639 RT 5 IAW DC-9 SRM 51-10-3, 51-30-2, 53-04 FIG 38, 51-10-4, EO 12-5330-29-BI058 I/R.