What was found
LT HORIZONTAL STABILIZER INSPAR RIB, AT HSS 129.50, 2ND VERTICAL STIFFENER IS CRACKED. REMOVED DAMAGED STIFFENER IAW SRM 55-10-09-2R-4. HFEC INSPECTION OF THE CUT OUT EDGES OF THE STIFFENER, WEB, AND EXISTING FASTENERS HOLES IAW SRM 55-10-09-2R-4. ET INSPECTED CUT EDGE AND HOLES IAW NDTM PART 6 51-00-00 PROCEDURE 23 AND 16, NO CRACKS NOTED. FABRICATED A REPAIR, APPLIED CHEMICAL CONVERSION COATING IAW SRM 55-10-09-2R-4. PRIMED REPAIR AND AREA IAW SRM 55-10-09-2R-4. INSTALLED THE REPAIR IAW SRM 55-10-09-2R-4.