As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT PIT INTERCOSTAL STA 767 TO 787 RBL 20 HAS CORROSION AT NUTPLATES ON TOP FLANGE. GROUNDED - YES. UPON FURTHER EVALUATION FOUND CORROSION TO BE 100% MAT LOSS OUT OF LIMITS. REMOVED AND REPLACED INTER COSTAL IAW 737-900 SRM 51-40-02-0G-0W=1" O= .050 R= 0.00 L= 2" D= .050.