As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING THE CONTINUING AIRWORTHINESS STRUCTURAL INSPECTION A CRACK WAS FOUND IN THE FLOOR LEVEL DOUBLER FOR THE LT FRAME AT FUSELAGE STATION 207.00, THE CRACK MOVED LATERALLY ACROSS THE DOUBLER FROM THE IB SIDE THOUGH 2 RIVET HOLES AND A BEND. THE PROBABLE CAUSE IS THAT THE DOUBLER HAD A PILOT HOLE THAT WAS DIRECTLY ADJACENT TO A RIVET HOLE WITH NO EDGE DISTANCE. THE CRACK WAS ABOUT 3.5 INCHES LONG.