As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING C-18 CHECK INTERGRANULAR CORROSION WAS FOUND ON L-1 DOOR CREASE BEAM AT FASTENER HOLES BETWEEN BS 318 AND BS 335. MAINTENANCE REMOVED CORRODED U-CHANNEL AT L-1 DOOR FROM BS 318 TO BS 335; FABRICATED A NEW REPLACEMENT U-CHANNEL; INSTALLED REPAIR PART IAW B737-300 SRM 51-30-01, FIG. 7.