What was found
SAW - DURING CPCP-4 INSPECTION, MAINTENANCE DISCOVERED FLOOR BEAMS 36, 38, 39, AND 40 CORRODED OUT OF LIMITS. MAINTENANCE REMOVED, FABARICATED AND INSTALLED NEW FLOOR BEAMS AT LOCATIONS 36, 38, 39, AND 40. MAINTENANCE SPLICED FLOOR BEAM 40 IAW SRM 53-00-00, FIG 429. AIRCRAFT RETURNED TO SERVICE. REF: OPERATOR CONTROL NRS SIMA97349-2, 97ZZZX70, AND 97ZZZX71.