What was found
GYR - DURING C12 CHECK DISCOVERED LEVEL 2 GALVANIC CORROSION ON THE MAIN CABIN FLOORBEAM UPPER EDGE AT BS 365 FROM BL 15R TO BL 35R. CORROSION WAS FOUND TO BE OUT OF LIMITS IAW BOEING 757-200 SRM 53-00-51-2A. MAINTENANCE CUT OUT AND REMOVED DAMAGED AREA IAW BOEING 757-200 SRM 53-00-51-2R-3 FIG 201. FABRICATED CHORD, REPAIR ANGLES, REPAIR STRAPS AND SHEAR CLIPS IAW BOEING 757-200 SRM 53-00-51-2R-3. INSTALLED FABRICATED REPAIR PARTS ON THE MAIN CABIN FLOORBEAM AT BS 365 FROM BL 15R TO BL 35R IAW BOEING 757-200 SRM 53-00-51-2R-3. LEVEL OF CORROSION HAS BEEN RE-EVALUATED AND DOWNGRADED FROM LEVEL 2 TO A LEVEL 1.