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-14 CHECK A 2 INCH CRACK WAS FOUND ON BS 178 BULKHEAD LT SIDE FRAME AT AFT SIDE OF CENTER RADIUS WL 207. MAINTENANCE REMOVED LT SIDE FRAME AT BS 178, WL 207; FABRICATED A NEW REPLACEMENT SIDE FRAME, INSTALLED REPAIR PART IAW B737-300 SRM 51-40-02 PG 3 & 4.