What was found
RT HORIZONTAL STAB UPPER TRAILING EDGE LOWER SURFACE FROM INBOARD END AND EXTENDING OUTBOARD 31.0 INCHES. THERE IS LIGHT TO SEVERE CORROSION AROUND AND BETWEEN NUT PLATES. REMOVED CORROSION IAW A310-200 SRM 51-74-10 AND FOUND A SECTION OUT OF LIMITS IAW A310-200 SRM 55-10-00. CUT OUT DAMAGED SECTION (RIB 3 TO RIB 5) AND FABRICATED REPAIR PARTS IAW A310-200 SRM 55-11-21 FIG 219. INSTALLED REPAIR PARTS IAW A310-200 SRM 55-11-21 AND 51- 40-21.