As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FWD PIT L/H TRANSITION HAS AREAS OF CORROSION STA 500A+9 TO 500L (DOT SM39-007). GROUNDED - YES. RMEOVED DAMAGE IAW B737-900ER SRM 53-00-53-2R-5 500A THRU 500G FOUND IN LIMITS 500G THRU 500L 100% MAT LOSS REMOVED AND REPLACED AREA IAW B737-900ER SRM 53+-00-53-2R-5W: 1.0 O: .040 R: .038 L: 1.000 D: .002.