What was found
LT HORIZONTAL STAB HSS 120.3 RIB 4; 3RD VERTICAL STIFFENER CRACKED. REMOVED LEFT HAND HORIZONTAL STAB INSPAR RIB TO ACCESS REPAIR IAW SRM 51-40-02-0G-0. CUT AND 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. ONE CRACK FOUND IN FASTENER COMMON THE 3RD STIFFENER. CUT AND REMOVED CRACK AROUND ONE FASTENER HOLE COMMON TO THE STIFFENER IAW SRM 55-10-09-2R-5 STEP 4.C. HFEC INSPECTED CUT EDGE IAW NDTM PART 6 51-00-00 PROCEDURE 23; NO CRACKS NOTED. FABRICATED REPAIR T-SECTION, ANGLE, FILLER ,AND SHIMS IAW SRM 55-10-09-2R-5 STEP 4 G-K. REINSTALLED THE RIB IAW SRM 51-40-02-0G-0 AND DWGS 002A0001; 182A3001, AND 182A1500.