As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN CABIN CTR WING BOX R/H SIDE SURFACE HAS CORROSION AT STRINGER 15 AND 27.5 INCH FROM CL. (114-02) ORIGINAL MATERIAL THICKNESS OF CENTER WING UPPER FWD & CENTER SKIN AT BLENDED SMOOTH AREAS BETWEEN STA X=-27 & X=-31 ABOVE STRG 15 LOCATION IS 0.159" THICK I.A.W DAC DWG APB7441 & APB7447