What was found
FAULT-STR-ZONE 200. LH MAIN CABIN COMPARTMENT FLOOR STRUCTURE FR21 Y0-Y450 METAL RIVETED FLOOR PANEL HAS CORROSION. REMOVED CORROSION AT LH MAIN CABIN COMPARTMENT FLOOR STRUCTURE FR21 Y0-Y450 METAL RIVETED FLOOR PANEL, ORIGINAL THICKNESS IS .129", MATERIAL LOSS IS .011" AND REMAINIG THICKNESS IS .118" FOUND TO BE OUT OF LIMITS, REWORK MAXIMUM IS .0039" IAW SRM 51-74-10-201 AND SRM 51-73-11-001. INSTALLED NEW METAL FLOOR PANEL AT LH MAIN CABIN COMPARTMENT FLOOR STRUCTURE FR21 Y0-Y450 IAW SRM 51-40-21-001. REINSTALLED SAME ADAPTER CLS (4EA) ON METAL FLOOR PANEL IAW SRM 51-40-21-001.