As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(B737-53-3-0736) MAIN CABIN LAV SUPPORT INTERCOSTAL CORRODED APPROX BS947 LBL24 ON UPPER SURFACE. TRANSCRIBED FROM HAECO GSO NR 9280485. BLENDED/REMOVED CORROSION IAW B737-900 51-10-02, FOUND TO BE OUT REPAIR. SEE SFR NUMBER: 1033221. REF HAECO GSO MECH V900838 IN OF LIMIS, REMOVED INTERCOSTAL AT STA987 LBL24 IAW B737-900 SRM 5 SP QC031 1-40-02. REMOVED & INSTALLED NEW INTERCOSTAL PART #147A5660-3 IA W BAC DWG 147A5650 REV C AND B737-900 SRM 51-40-02 CATEGORY A