What was found
DURING A CPCP 4 INSPECTION PERFORMED AT AMR EAGLE MAINTENANCE CENTER, FOUND THE LEFT SIDE STR 21 BETWEEN FRAMES 44 AND 45 CORRODED. REMOVED AND REPLACED STR 21 LT IAW ATR SRM 51-25-02. CAUSE OF DAMAGE: ENVIRONMENTAL. AIRCRAFT TT: 18,688.4 HOURS/TAC: 23,278. (X)