What was found
LHS LEADING EDGE HAS RIB 4 CRACKED. 8-22 / [01] REMOVED AT LT HORIZONTAL STABILIZER OF LEADING EDGE RIB #4 IN IAW SRM 51-40-02-0G-0;[02] LOCATED AND DRILLED NEW RIB IN IAW SRM 51-40-05-0G-0;[03] VERIFIED 1-2. OK TO INSTALL NEW RIB.;[04] INSTALLED NEW RIB #4 AT LT HORIZONTAL STABILIZER LEADING EDGE IN IAW SRM 51-40-02-0G-0 AND DWG # 186A1001;[05] REMOVED AND INSTALLED NEW RIB #4 AT LT HORIZONTAL STABILIZER LEADING EDGE P/N 186A1304-1 IN IAW SRM 51-40-02-0G-0 AND DWG # 186A1001;[06] VERIFIED 4-5.