As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT PIT L/H TRANSITION HAS MULTIPLE AREAS OF CORROSION FROM STA 727-767. GROUNDED - YES. REMOVED CORROSION STA 727-STA 767 AND REPLACED SECTION STA727H+10 TO STA727I+8 IAW B737-800 SRM 53-00-53-2R-6 REMAINING BLENDOUTS FOUND TO BE WITHIN LIMITS IAW B737-800 SRM 53-00-53-1A-2 .040 ORIG. - .038 REMAIN - .036 MIN ALLOWED W=1 O=0.040 R=0.019 L=1.4 D=0.021.