What was found
MDCC FLOOR THRUST PLATE BETWEEN FR 30 TO 31 AND SEAT TRACKS 5R TO 6R UPPER SURFACE HAS 3 EA AREAS OF CORROSION. MEASURED 1 SQ", 2 SQ", AND 2 SQ". REMOVED CORROSION IAW SRM 51-74-10 AND FOUND TO BE OUT OF TOLERANCES IAW SRM51-73-11 AND DWG AIB STANDARD MANUAL DAN 11304. REMOVED THRUST PLATE AT FR 30-31, SEAT TRACK 5-6R IAW FSRM 51-40-21. LOCATED, DRILLED, INSTALLED STIFFINER AND NEW THRUST PLATE IAW SRM 51-44-00 AND SRM 51-40-21.