As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT PIT FLOORBOARD 140CF IS CORRODED / RECEIVED NEW AFT PIT FLOOR BOARD #140CF A-TAG# WN4156 PN #453A2610-2; ORIGINAL PANEL FOUND TO BE OUT OF LIMITS OF 100% IAW 53-00-53-1A-1 ALLOWABLE DAMAGE OF MORE THAN 3.0 INCHES MAXIMUM OF CORROSION STEP 5(1)B