What was found
LEFT WING STRINGER U-8 CRACKED AT WSTA 564.50+10' / [01] PERFORMED HFEC INSP TO DETERMINE CRACK LENGTH WHICH IS 0.0250'. SEE ATTACHED PHOTO. CRACK PROPAGATES FROM FASTENER HOLE TO END OF STRINGER.;[02] INSTALLED EWIS PROTECCION AROUND OF REPAIR AREA AS PER AMM #20-60-0709130-801;[03] REMOVED RIVETS AT THE END STRINGER #8 UPPER AS PER EA#22-157-02838-WIP1.;[04] ON STEP # 3 REMOVED [03] RIVETS.;[05] VERIFIED STEPS #2; #3 AND #4.;[06] ACCOMPLISHED REPAIR OF L/H WING STR. U-8 WSTA 564.50+10' AS PER EA 22-157-02838 WIP 1 INSTRUCTIONS; FAULT #TTG8Q00EXDY4.;[07] REMOVED EWIS PROTECTION PER B737-700 AMM 20-60-07-913-801.;[08] VERIFIED STEPS #6 AND #7