What was found
DURING OP 16 MAINT CHECK, FOUND CORROSION AT STA 200, ON BOTH SIDES OF FORMER AT FLOOR LINE, FORWARD LEFT CABIN DOOR. CUT OUT CORRODED SECTION PER SPM 6-80-01. REMOVED AND REPLACED SUPPORT FROM MIDDLE OF FORWARD LEFT ENTRY DOOR TO STA 229, PER ARA 16316.