What was found
MCN - DURING C24 CHECK DISCOVERED L1 DOOR FRAME ANGLE CRACKED, .5 INCHES, AT 7TH FROM TOP AFT STOP FITTING. MAINTENANCE REMOVED, FABRICATED AND INSTALLED REPLACEMENT ANGLE ON THE L1 DOOR FRAME, 7TH FROM THE TOP AFT STOP FITTING IAW BOEING 737-300 SRM 51-40-02-0G PAR 4B FIG 3, 4, AND 8.