What was found
DURING M-CHECK, FOUND AFT CABIN, STA 1640 FLOORBEAM CORRODED AS MARKED BETWEEN LBL 51-5 AND RBL 51.5. BLENDED SEVERAL AREAS IAW SRM 51-10-02. FOUND 2 PLACES OF CORROSION OUT OF LIMITS BETWEEN RT BL 51.5 TO BL 0 IAW SRM 53-00-51, FIG 101. REMOVED UPPER CHORD IAW SRM 51-40-02, FABRICATED UPPER CHORD IAW SRM 53-00-51, REPAIR 3. LOCATED AND DRILLED UPPER CHORD IAW SRM 51-40-05, TREATED AND PRIMED UPPER CHORD IAW SRM 51-20-01 AND TOP COATED UPPER CHORD IAW SRM 51-21-02, INSTALLED UPPER CHORD IAW SRM 51-40-02.