What was found
LEFT BLEED DUCT WARNING MESSAGE. DUCT WENT RED FROM THE ISOLATION VALVE FROM LEFT ENGINE ON ANTI-ICE PAGE. ASSOCIATED WITH A BURNING ODOR IN THE ENTIRE AIRCRAFT. PLASTIC BURNING ODOR. TROUBLESHOT BLEED LEAK REPAIR, BLEED LEAK AND ODOR EVENT OPS CHECKED GOOD. TROUBLESHOT IAW FIM TASK 21-21-00. PERFORMED ENGINE RUNS WITH PACKS ON AT MUTIPLE POWER SETTINGS AND IN MUTIPLE BLEED CONFIGURATIONS. NO ORDORS NOTED. REMOVED AND REPLACED LOOSE BOLTS, DAMAGED O-RING, AND SEALS FROM CONDENSER-REHEATER PIPE ASSY TO ACM IAW AMM 21-51-80. OPS & LEAK CHECKS PERFORMED IAW AMM 21-51-00. OPS & LEAK CHECKED GOOD. REMOVED AND REPLACED THE O-RING FROM ACM PIPE ASSY TO HEAT EXCHANGER IAW AMM 21-51-80. OPS & LEAK CHECKS PERFORMED IAW AMM 21-51-00. OPS & LEAK CHECKED GOOD. REMOVED AND REPLACED THE LT WING ANTI-ICE VALVE INSULATION JACKET IAW AMM 36-19-01.