What was found
AIR TURN BACK DUE TO BURNING SMELL AND DUCT 1 OVERTEMP CAS MESSAGE ON CLIMB. CREW RAN QRH, DECLARED EMERGENCY, LANDED WITHOUT INCIDENT AT KCOS. REPLACED LH TMV IAW EMB 505 AMM 21-61-01. SYSTEM OPS/LEAK CHECK GOOD. P/N OFF/ON: 1300330-11, S/N OFF: 1656, S/N ON: 666.