What was found
RIGHT HORIZONTAL STILIZER RIB 4 CRACKED AT STIFFENER 2 LOWER RADIUS.<[01] REMOVED THE DAMAGE PART OF THE RIB 4 STIFFENER 2 LOWER RADIUS AS SHOW IN FIG. 202 PARA.4 LETTER B REF. SRM 55-10-09-2R-4 REPAIR 4;[02] PERFORMED HFEC INSP ON REWORKED; IAW B 737 NDT PART 6 51-00-00 PROCE 23. TOOL NORTEC 600. BC 166316. CALIB DUE 10-17-23. NO CRACKS FOUND.;[03] PERFORMED HFEC ROTO INSP ON FASTENER OPEN HOLES NEAR TO REWORKED AREA; IAW B 737 NDT PART 6 51-00-00 PROCE 16. TOOL NORTEC 600. BC 166316. CALIB DUE 10-17-23. NO CRACKS FOUND.;[04] VERIFIED STEP # 1;[05] LOCATED AND DRILLING PARTS OF THE REPAIR OF KIT P/N 55100003-01 PO#1792296 ON THE RIB 4 OF STIFFENER 2 LOWER RADIUS REF. SRM 55-10-09-2R-4 REPAIR 4 LETTERS (G;H;I;J);[06] VERIFIED STEP #5.<BR> OK TO TREAT AND PRIME DRILLED HOLES AND REPAIR PARTS AND AREA.;[07] (RII) PERFORMED A GENERAL VISUAL INSPECTION (GVI) OF ALL AREAS WITHIN THE REPAIR AREA; (INCLUDING UNDERLYING STRUCTURE) FOR CORROSION; EXISTING REPAIR OR ANY OTHER DEFECTS.;[08] APPLIED TREAT AND PRIMER TO PARTS OF THE REPAIR AND THE RIB 4 OF THE STIFFENER 2 LOWER RADIUS REF. SRM 55-10-09-2R-4 REPAIR 4 PARA. 4 LETTERS (K;L);[09] ADD TO STEP #7.<BR> PER REF. SRM 55-10-09-2R-4 STEP 4 E.;[10] (RII) VERIFIED STEP #8.<BR> OK TO INSTALL NEW REPAIR PARTS.;[11] INSTALLED REPAIR ON THE RIB 4 STIFFENER 2 LOWER RADIUS REF. SRM 55-10-09-2R-4 REPAIR 4 PARA. 4 LETTERS (M;N;O;P;Q;R);[12] (RII) FINAL INSPECTION; RIB REPAIR ACCOMPLISHED.