What was found
DURING THE CURRENT MAINTENANCE PROCESS IT WAS FOUND AT RT WING THE UPPER VENT STRINGERS S9U-S10U WITH CORROSION ON THE CHANNEL AREA INTERNAL SURFACE AT WS 557. THE CORROSION WAS COMPLETELY REMOVED AS PER SRM 51-10-02 PARAGRAPH 14A AND IT WAS FOUND OUT OF LIMITS IAW SRM 57-00-03 DETAIL III FIGURE 101; ORIGINAL THICKNESS 0.080 INCH, MATERIAL REMOVED 0.018 INCH, REMAINING THICKNESS 0.062 INCH. THE DAMAGE WAS REPAIRED UNDER S/R: 4-4131592667 REPAIR INSTRUCTIONS AND APPROVED BY FAA FORM 8100-9 PROVIDED BY MANUFACTURER.