What was found
WHILE IN FOR SI CHECK, MAINTENANCE REPORTED AFT CARGO DOOR NR 3 O/B TRANSVERSE BEAM L-ANGLE CRACKED IN RADIUS AT NR 1 OUTER SKIN VERTICAL STIFFENER. REMOVED AND REPLACED DOOR L-ANGLE IAW SRM 51-10-1, 51-30-2, 51-40-2, 51-20-21, 51-30-1 AND MM 51-20-151 AND 51-20-21.