What was found
MCN - MAJOR REPAIR - DURING C-18 CHECK A .375 INCH CRACK WAS FOUND ON AFT SIDE OF R-1 DOOR FRAME, 3RD STOP CUTOUT FROM THE BOTTOM AT INBOARD SIDE, BS 327, STR 12 RT. MAINTENANCE REMOVED DAMAGE AT AFT SIDE OF R-1 DOOR FRAME, 3RD STOP CUTOUT FROM THE BOTTOM BS 327, STR 12 RT; FABRICATED A REPAIR ANGLE; INSTALLED REPAIR PART IAW B737-300 SRM 51-70-11 FIG 1, PG 1-6.