What was found
MCN - MAJOR REPAIR - DURING C-21 CHECK FOUND L1 DOOR AFT UPPER CORNER STOP FITTING CRACKED .550 INCHES IN LENGTH AT STRINGER 8L AND BS 344. MAINTENANCE REMOVED THE DAMAGED L1 DOOR AFT UPPER STOP FITTING AND REPLACED IT IAW BOEING 737-300 SRM 51-40-02-0 FIGURE S 3, 6, 7, 8, 12 AND 14.