What was found
DURING M-CHECK FOUND FWD CABIN FLOORBEAM PREVIOUS REPAIR FROM LBL 64 TO RBL 38 CORRODED AT 7 LOCATIONS AS MARKED AT BS 377.7. REMOVED CORROSION AREA BEAM FOUND TO BE OUT OF LIMITS IAW SRM 53-00-51, ORIG MATERIAL .125 MAX ALLOWABLE 10 PERCENT. REMOVED (2 EA) UPPER CHORDS, (2EA) STRAPS AND (1) ANGLE AT BS 377.7 LBL 64.0 AND 45.0 IAW SRM 51-40-02. FABRICATED UPPER CHORD REPAIR IAW SRM 53-00-51, FIG 201, REPAIR 3. TREATED AND PRIMED UPPER CHORDS IAW SRM 51-20-01. PAINTED AREA IAW AMM 51-20-00. INSTALLED FLOORBEAM REPAIR AT STA 377 FROM LBL 64-45.5 201 REPAIR 3.