As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING C-CHECK AT AERO CORP, FOUND LT BS 578 FRAME WL 205 LBL 58 CRACKED APPROXIMATELY .50 INCH LOWER INBOARD CORNER. FABRICATED FRAME FROM 7075 0.050 33.50 INCHES BY 7.25 INCHES IAW B 737 SRM 51-20-1 FIG 7. INSTALLED IAW B 737 SRM 51-20-1 FIG 7 AND 51-30-1. (X)