As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INSPECTION TYPE-SI, SEVERAL RIVETS SHOW SIGNS OF CORROSION EMANATING FROM FASTENER HOLES, THIRD HOLE AFT ON KEEL BEAM, LOWER FWD CHORD, (MARKED) (C53-123-01.03-01) STA 750 BL 0. LOWER CHORD FOUND TO BE CORRODED OUT OF LIMITS PER SRM 53-10-1. INSTALLED NEW LOWER CHORD PER SRM 51-40-4.