As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE IN FOR SI CHECK, MAINTENANCE FOUND CORROSION ON BEAM STA 420 LBL 0 TO LBL 24 AND LBL 45 - LBL 65, WL 208 LOWER SIDE OF UPPER CHORD. MAINTENANCE REMOVED CORROSION ON UPPER CHORD OF FLOOR BEAM, FOUND TO BE OUT OF LIMITS IAW SRM 53-10-1. MAINTENANCE REMOVED AND REPLACED UPPER CHORD OF FLOOR BEAM PER UPS EO B727-5310-7455A.