As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LCQ - MAJOR REPAIR - DURING C-09 CHECK INTERGRANULAR CORROSION WAS FOUND ON INTERCOSTAL WEB UNDER R/H OUTBOARD FLOORBOARD STRINGER, AFT CARGO COMPARTMENT, BS 1300 TO 1320. MAINTENANCE REMOVED CORRODED INTERCOSTAL WEB BS 1300 TO 1320; FABRICATED A NEW INTERCOSTAL WEB PER DWG 146N5400; INSTALLED REPAIR PART IAW B737-200 SRM 51-40-02, PG. 1.