What was found
LT HORIZONTAL STAB HSS 120.3, RIB 4, 4TH VERTICAL STIFFENER WAS CRACKED. CUT & REMOVED CRACK DAMAGE ON VERTICAL STIFFENER IAW SRM 55-10-09-2R-4 STEP 4.B. HFEC INSPECTED OPEN HOLES IAW NDTM PART 6 51-00-00 PROCEDURE 16. NO CRACKS NOTED. HFEC INSPECTED CUT OUT IAW NDTM PART 6, 51-00-00 PROCEDURE 23. NO CRACKS NOTED. FABRICATED REPAIR T-SECTION, ANGLE, AND SHIMS IAW SRM 55-10-09-2R-4. STEP 4. F - J. APPLIED CHEMICAL CONVERSION COATING TO REPAIR, BARE SURFACES & EDGES OF RIB IAW SRM 55-10-09-2R-4. STEP 4.K. APPLIED PRIMER TO REPAIR, BARE SURFACES, & EDGES OF RIB IAW SRM 55-10-09-2R-4 STEP 4.L. INSTALLED THE REPAIR & APPLIED FILLET SEAL IAW SRM 55-10-09-2R-4 STEP 4.M - Q.