Part Number: 101-550221-1 (Tube assy-lh) Part Number: 101-550222-1 (Tube envir bleed air) Part Number: 101-550228-1 (Duct assy-defrost,co) Part Number: 101-550228-3 (Duct-ductassemdefrost&cockpi) Part Number: 101-550228-5 (Back plate duct as cockpit h) Part Number: 101-550228-7 (Wire cable duct assem) Part Number: 101-550229-1 (Valve assy-defrost) Part Number: 101-550229-3 (Weld assem-valve a defrost c) Part Number: 101-550229-5 (Tube weld assembly) Part Number: 101-550229-7 (Flange-weld assem) Part Number: 101-550230-1 (Shaft & arm assem valve asse) Part Number: 101-550230-3 (Shaft-defrost air) Part Number: 101-550230-5 (Arm-shaft assem defrost ) Part Number: 101-550238-1 (Tube)