As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT PIT L/H TRANSITION PANEL HAS MULTIPLE AREAS OF CORROSION BETWEEN STA 727J+12 ST STA 787. GROUNDED - YES. REMOVED CORROSION FOUND TO BE OUT OF LIMITS IAW B737-900 SRM 53-70-53-1A-2 REPAIRED AFT PIT L/H TRANSITION PANEL FROM STA 727J+12 TO STA 787 IAW B737-900 SRM 53-00-53-2R-5W=1.4 O=.040 R=.020 L=8.00 D=.020.