As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE GAINING ACCESS FOR REPAIR IN AFT CARGO FOUND AREAS OF CORROSION ON RH TRANSITION FROM FS 727 TO FS 767. GROUNDED - YES. REPAIRED TRANSITION FROM F.S 727 TO FS 767 IAW BOEING 737-800 SRM 53-00-53-2R-5W= 1' O= .040" R= .000 L= 3" D= .040.