What was found
BLEED LOOP FAULT CYAN CAS: AT 43000FT CYAN BLEED LOOP FAULT CAS MESSAGE FOLLOWED SHORTLY AFTER WITH A RED PACK LEAK MESSAGE. FOLLOWING CHECKLIST WE DESCENDED AND AT AROUND 30000FT RED CABIN ALTITUDE ILLUMINED CAUSING PAX O2 MASKS TO DEPLOY. CORRECTIVE ACTION: REPLACED LEFT FLOW CONTROL VALVE IAW CL350AMM 21-51-09 AND REPLACED PERISEAL IAW CL350 AMM 21-52-09 DISCOVERED BAD FUSION TAPE, MOVEMENT ON CLAMPS, AND BLEED LOOP NOT SECURED IN TWO LOCATIONS, REPLACED FUSION TAPE, SECURED CLAMPS AND SECURED BLEED LOOP IAW CL 350 SMART FIX GUILD FOR BLEED LOOP. F