What was found
L/H HORIZONTAL STAB RIB; STAB STA 120.3 AT 3RD STIFFNER AFT; LOWER SECTION HAS CRACK. / GAINED ACCESS TO L/H HORIZONTAL STAB RIB; STAB STA 120.3. REMOVED DAMAGE FROM 3RD STIFFENER AFT IAW B737 SRM 55-10-09-2R-4 STEP 4B. HFEC FOR CRACKS. NO DEFECTS NOTED REPAIRED STIFFENER IAW B737 SRM 55-10-09-2R-4 STEP 4 M-Q. REMOVED AND REINSTALLED EIB AT STA 120.3 IAW BOEING DWG 182A3001 REV: A. RESTORED ACCESS STAB RIB IAW BOEING DWG 182A1500 REV: A AND B737 SRM 51-40-02-0G-0. APPLIED TOP COAT IAW B737 AMM 51-21-73-370-804