As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MCN - DURING C13 CHECK DISCOVERED VERTICAL CHORD CRACKED, .7 INCHES, AT AFT SIDE OF 178 BULKHEAD BL 5.7L AND WL 184. MAINTENANCE CUT OUT DAMAGED AREA OF FORWARD CHORD AT BL 5.7L IAW BOEING 737-300 SRM 53-10-08-2R5. FABRICATED FILLER IAW BOEING 737-300 SRM 53-10-08-2R5. RECEIVED ADDITIONAL REPAIR PARTS AS PART OF REPAIR KIT. INSTALLED REPAIR PARTS AT AFT SIDE OF 178 BULKHEAD BL 5.7L AND WL 184 IAW BOEING 737-300 SRM 53-10-08-2R5.