What was found
SAW - DURING CPCP-4 INSPECTION, MAINTENANCE DISCOVERED THE LEFT AFT OUTBOARD, LEFT CENTER INBOARD, RIGHT AFT OUTBOARD AND RIGHT AFT INBOARD SEAT TRACKS CORRODED OUT OF LIMITS. MAINTENANCE REMOVED AND INSTALLED ALL FOUR SEAT TRACKS IAW SRM 51-25-04. AIRCRAFT RETURNED TO SERVICE. REF: OPERATOR CONTROL NRS SIMA97349-1, 97ZZZX73, AND 97ZZZX74.