As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
L/H TRANSITION PANEL CORRODED FROM STA 727B+10 TO STA 787. GROUNDED - YES. REMOVED CORROSION AND CHECKED LIMITS FOUND TO BE OUT OF LIMITS IAW B737-900ER SRM 53-00-53-1A-2 REMOVED AND REPLACED TRANSITION PANEL IAW B737-900ER SRM 53-00-53-2R-5W=2.0 O=.040 R=.021 L=24.0 D=.019.