As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) WHEN REMOVING THE RT INBD FUEL TANK DUE TO A LEAK, CORROSION WAS NOTED ON THE FORWARD STRINGER, DIRECTLY BEHIND THE EXHAUST PIPE. THE CORROSION PRODUCED A HOLE THAT WAS APPROX 1.0" X 0.75". AN APPROVED REPAIR IS BEING CARRIED OUT.