What was found
WHILE IN SI CHECK, MAINTENANCE FOUND CRACKED T-CHORD ON RT HORIZ STAB. UPPER SURFACE SKIN SUPPORT CRACKED AT ATTACH POINT OF NR 1 ELEV HINGE SUPPORT RIB (ACCESS THROUGH PANEL 9213). REMOVED AND REPLACED T-CHORD IAW SRM 51-30-2, 51-30-2, 51-30-5.