As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MCN - MAJOR REPAIR - DURING C-18 CHECK FOUND THE L-1 DOOR INTERCOSTAL CHAFED AT LOWER HINGE CUTOUT BS 303.9, STR 13 LT. MAINTENANCE REMOVED INTERCOSTAL AT LOWER HINGE CUTOUT BS 303.9, STR 13 LT; FABRICATED A NEW REPLACEMENT INTERCOSTAL; INSTALLED REPAIR PART IAW B737-300 SRM 51-40-02 FIG 8 & 12 PG 1 & 38.