What was found
LH WING FIXED LEADING EDGE #4 RIB AT KRAS 166.32 APPROXIMATELY 10' UP FROM LOWER SKIN EDGE; HAS A FASTENER HOLE WITH AN NDT CRACK INDICATION. -MARKED- <[01]. REAMED HOLE TO 0.216 DIAMETER PER SRM 51-40-05.; [02] ACCOMPLISHED A HIGH-FREQUENCY EDDY CURRENT (HFEC) HOLE PROBE INSPECTION OF THE REAMED HOLE PER 737 NDT PART 6; 51-00-00 PROCEDURE 16. CRACK INDICATION STILL EXISTS; AT 7:00 POSITION. ; [03] DESCREPANT HOLE OVERSIZED TO .216? PER. SRM.51-40-05; AND EA#25-157-01419-WIP3. STEP 4.; [04] CERTIFIED.; [05] STARTED REMOVING FASTENERS IN SKIN COMMON TO RIB 4. SRM 51-40-02.; [06] REMOVED 4 RIVETS COMMON TO LEADING EDGE SKIN AND 6 HILLOCKS COMMON TO LOWER STIFFER CHANNEL AND AFT WEB IAW SRM 51-40-02; [07] REMOVED #4 RIB OUT OF L/H WING FIXED L/E AFTER FASTENERS PREVIOUSLY REMOVED ON STEPS #5 & #6 IAW SRM 51-40-02.