What was found
PITTING CORROSION ON RT CREASE BEAM WEB FRAME 23-23A. LEVEL II CORROSION. REMOVED 4 EA FASTENERS TO ALLOW FOR CORROSION REMOVAL IAW ATR 72 SRM 51-25-01 AND 51-25-04 REV 77. REMOVED CORROSION FROM CREASE BEAM WEB AS MARKED IAW ATR 72 SRM 51-21-42 REV 77. MEASURED AFFECTED AREA MIN MATERIAL REMAINING .038" REF ATR NTM 51-40-00 REV 34. MATERIAL LOSS FOUND TO BE OUT OF LIMITS IAW ATR 72 SRM 53-51-50 FIG 101 ITEM 1 AND 53-51-00 FIG 301 REV 77. REMOVED CREASE BEAM WEB FR 23-23A IAW ATR 72 SRM 51-25-01 AND 51-25-04 REV 77. MATCH DRILLED NEW WEB AND INSTALLED STIFFENER ONTO WEB IAW ATR 72 SRM 51-25-01 REV 77. OK TO INSTALL. INSTALLED CREASE BEAM WEB IAW ATR 72 SRM 51-25-01 AND 51-25-04 REV 77.