What was found
RT HORIZONTAL STABILIZER INSPAR RIB #5 - STIFFENER #4 HAS A POSSIBLE CRACK.<[01] PERFORMED HFEC ON SUSPECTED CRACK ON STIFFENER #4 OF RIB #5 OF RH HORIZONTAL STABILIZER. CRACK CONFIRMED IAW NDTM PART 6; 51-00-00 PROCEDURE 23.<BR>[NORTEC 600 ; B/C 166316 ; CALIB.DUE-10/23];[02] PERFORMED HFEC INSP ON REWORKED AREA IAW B737 NDT P6 51-00-00 PROC.23; NO CRACKS<BR>TOOL USED : NORTEC 600 B/C 166316 CALDUE: 10/23;[03] CORRECTION: PERFORMED HFEC INSP ON REWORKED AREA IAW B737 NDT P6 51-00-00 PROC.23; CRACKED MARKED AND NOTED<BR>TOOL USED : NORTEC 600 B/C 166316 CALDUE: 10/23;[04] INSTALLED REPAIR AT RT HORIZONTAL STABILIZER SS 129.5 RIB #5 STIFFENER #4 REF SRM 55-10-09-2R-4.;[05] VERIFIED STEP 4