What was found
AFTER RECEIVING GEN 1 OFF, RECEIVED A FWD SMOKE CARGO. SMOKE WARNING WENT AWAY AFTER ABOUT 2 MINS. CHKD W FLT ATTS & NO SMOKE OR ODOR IN CABIN. RETURNED TO SHV. AFTER LANDING, COULD SMELL AN ELECT BURNING ODOR & BLEW FWD CARGO HALON BOTTLES. SMOKE WARNING CAME ON ABOUT THIS TIME. FLT 6511. TROUBLESHOT GEN 1 OFF & FWD CARGO SMOKE WARNING EVENT IAW STEPS IN FIM 21-22-00, SMOKE/ABNORMAL ODOR IN PAX CABIN. WHILE OPENING FWD AVIONICS BAY, IMMEDIATE ODOR OF ELECT BURNING NOTICED. DURING INSP OF OF GCUS, FOUND GCU 1 TO BE BLACKENED & BURNED. R & R GCU 1, R & R IDG 1, R & R OF LRD CARGO FIRE BOTTLE. R & R HRD CARGO BOTTLE, R & R ACPC ASSY. NO GEN 1 OFF, OR FWD CARGO SMOKE MESSAGES POSTED & NO BURNING ODORS.