What was found
EMERGENCY DECLARED, BTB. AFTER BOTH ENGINES STARTED AND AFTER TURNING LEFT PACK ON AND RIGHT PACK OFF - MASTER CAUTION WARNING ILLUMINATED ALONG WITH MAIN DECK CARGO SMOKE MID 1, RED SMOKE, LOOP A & B AMBER, ALSO CLAMP SECURING THE SLEEVE BETWEEN THE HEAT EXCHANGER AND DUCTING FOUND TO BE LOOSE, ALLOWING HOT AIR TO ESCAPE. OPEN