What was found
LH WING; I/B REAR SPAR; WAFFLE PLATE CRACKED I/B END (JUST O/B OF WING ROOT) / REMOVED WIGGLE PLATE @ L/H WING; I/B REAR SPAR; I/B END (JUST O/B OF WING ROOT). RECEIVED NEW WIGGLE PLATE P/N 115A2781-12 SI# 7570568. LOCATED & DRILLED NEW WIGGLE PLATE. INSTALLED NEW WIGGLE PLATE. APPLIED EXTERIOR TOPCOAT. ALL ACTIONS ARE IAW B737 SRM'S 51-40-02-0G-0; 51-40-05-0G-0; 51-40-06-0G-0; AIPC 57-50-00-27; & AMM 51-21-73-370-801 ATAG# WN0720