What was found
RIGHT HORIZONTAL STAB FWD UPPER SLIDER SEAL IS CRACKED. REMOVED RT STAB TO BODY UPPR FRONT SPAR SLIDING SEAL IAW AMM 53-31-31. INSTALLED SLIDING SEAL FITTING ASSY TO SLIDING SEAL WITH FASTENERS IAW SRM 51-40-02. INSTALLED RT STAB TO BODY UPPR FRONT SPAR SLIDING SEAL IAW AMM 53-31-31. INSPECTED AND VERIFIED THE REMOVAL AND INSTALLATION OF UPPR FRONT SPAR SLIDING SEAL IAW AMM 53-31-31. OPS CHECKED IAW AMM 27-41-00. OPS CHECKED NORMAL.