What was found
HEAVY CK COE / LEVEL 2 CORROSION: LT AFT CARGO DOOR THRESHOLD FLOORBOARD SUPPORT FR 36-38 UPPER SURFACE HAS TOOLING MARKS, CORROSION AND MISSING SURFACE PROTECTION (LENTH 12", WIDTH 2", DEPTH .009"). REMOVE AND REPLACE WITH OEM PART PER ATR72 STRUCTURAL REPAIR MANUAL.