What was found
DURING C-CHECK INSPECTION IN BNA, THE RIGHT OUTBOARD CROSSBEAM WAS CORRODED AT FRAME 20. CORROSION WAS ALSO FOUND ON THE LEFT OUTBOARD CROSS BEAM (P/N 120-14243-001) AT FRAME 15. MAINTENANCE REMOVED AND REPLACED THE CORRODED CROSSBEAMS IAW SRMS 51-21-04, 51-21-05, 51-25-00, AND 51-40-02. (M)