What was found
MCN - MAJOR REPAIR - DURING C-12 CHECK A 1/2" CRACK WAS FOUND ON STRINGER CLIP IN THE L/H AFT CARGO COMPARTMENT BS 807, SRT 25 L/H. MAINTENANCE REMOVED CRACKED STRINGER CLIP AT BS 807 STR25 L/H, FABRICATED A NEW STRINGER CLIP AND INSTALLED REPAIR IAW DWG 69-35352, AND B737-300 SRM 51-40-02, PG. 2-3, 10-11, & 38.