As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PASSENGER CABIN AFT WET AREA L 2 INNER CHORD (NOP SILL) CORRODED FROM STA 947 TO 986. REMOVED CORROSION MATERIAL LOSS FOUND TO BE OUT OF LIMITS. REPLACED INNER CHORD AND REINSTALLED ATTACHING PARTS IAW B737 400 SRM 53 60 15, 51 40 05 & 51 40 02.