What was found
A/C DISTRIBUTION BAY BS 740 LBL 6" A/C DUCT SUPPORT BRACKET IS CRACKED ON BULKHEAD ATTACH FLANGE. REMOVED CRACKED SUPPORT BRACKET. VERIFIED MATERIAL AND FABRICATED NEW BRACKET. TREATED, PRIMED, AND INSTALLED NEW BRACKET REF SRM 51-30-2,PG 13-14/ SRM 51-10-2,PG 1, BOEING DRAWING NR 69-47707.