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-19 CHECK INTERGRANULAR CORROSION WAS FOUND ON L-1 DOOR CREASE BEAM AT TOP OF FLOOR STRUCTURE AROUND FASTENER HOLES FROM BS 300 TO BS 344. MAINTENANCE REMOVED CORRODED CREASE BEAM FROM BS 300 TO BS 344; FABRICATED A NEW REPLACEMENT CREASE BEAM PER DWG 65-17683; INSTALLED REPAIR PART IAW B737-300 SRM 51-40-02, PARA 4-B.