What was found
DURING C-21 CHECK, FOUND CRACK .750 INCHES IN LENGTH AT FORWARD CARGO DOOR LOCATED ON FORWARD EDGE BELOW HOLD OPEN HOOK. MX REMOVED CRACKED CARGO DOOR FRAME IAW BOEING 737-300 SRM 51-40-02-0 FIG 8. INSTALLED NEW FRAME ASSEMBLY IAW BOEING 737-300 SRM 51-40-02-0 FIG 3, 4, 6, 7, 8, 12, 13, 14 AND BAC DWG 65-46921.