What was found
CORROSION ON CENTER WING BOX APPROX 830 AT RBL 10.0. MECHANICALLY REMOVED CORROSION ON CENTER WING BOX STA 830 RBL 10 IAW B727 SRM 51-10-6. ULTRASONIC INSPECTION OF BLEND AREA IAW ASTM E797-95, HIGH READING .209" LOW READING .128" MATERIAL LOSS .082" FOUND OUT OF LIMITS IAW B727 SRM 57-30-1 FIG 4. CUT OUT AREA OF SKIN FOR REPAIR IAW B727 SRM 57-30-3. FABRICATED REPAIR DOUBLER AND FILLER FROM 7075-T6 .250, 12 X 12 INCHES, ALODINED, PRIMED IAW B727 SRM 57-30-3 FIG 1, INSTALLED REPAIR IAW B727 SRM 57-30-3 FIG 1, 51-10-1 PART 6, AND 51-30-2.