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 IS CORRODED FROM STA 500H TO 500I. GROUNDED - YES. REMOVED CORRODED SECTION OF LH TRANSITION PANEL (SIDEPLATE) STA 500F+10 TO STA 500L IAW B737-9000ER SRM 53-00-53-2R-5 (AREA OF 100% MATERIAL LOSS). INSTALLED NEW LH TRANSITION PANEL (SIDEPLATE WITH SPLICE) IAW B737-900ER SRM 53-00-53-2R-5 REPAIR 5. W 1" O .040" R .032" L 6" D .008"