As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LOWER FUS. WING CENTER SECTION REAR SPAR STIFFENER CRACKED @ LOWEER RADIUS O/B OF L/H RAM AIR EXIT EXHAUST DUCT STA 663.75.MKD DOT<[01] REMOVED AND INSTALLED NEW STIFFENER AT LOWER FUS. WING CENTER SECTION REAR SPAR STIFFENER RAM AIR EXIT EXHAUST DUCT STA 663.75;[02] IN ADDITION TO STEP 1: AS PER REF. B737-700 SRM 51-40-02-0G-0 AND DWG 111A1000 SHEET 104.;[03] VERIFIED; STEP # 1 AND 2.