What was found
FOUND AFT AIRSTAIR, FOURTH STEP FROM THE BOTTOM, WEB ON INBOARD AND OUTBOARD SIDE OF STEP WAS CORRODED. CUT OUT CORROSION, FABRICATED AND INSTALLED REPAIR FILLERS, DOUBLERS AND ATTACH ANGLE IAW DC9 SRM 52-01 FIGURE 1, 51-30-2, 51-20-4, 51-10-2.