Buy or Sell P/N 137742Y21

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Part Number: 101-550071-13 (Plate weld assem) Part Number: 101-550071-15 (Duct assem-heat & vent) Part Number: 101-550080-1 (Duct - eyeball air) Part Number: 101-550080-3 (Duct-rh) Part Number: 101-550081-1 (Duct) Part Number: 101-550081-3 (Duct-lh) Part Number: 101-550081-5 (Duct air) Part Number: 101-550082-01 (Duct environmental b) Part Number: 101-550082-1 (Duct envirmental bleed air) Part Number: 101-550082-2 (Duct - envirmental bleed air) Part Number: 101-550083-1 (Duct assy) Part Number: 101-550083-5 (Tube-bleedair) Part Number: 101-550083-6 (Duct) Part Number: 101-550084-1 (Duct) Part Number: 101-550084-3 (Tube bleed air)	PN: 137720-01 (Ring assy) PN: 137742-4-10 (Ring) PN: 137742Y (Ring) PN: 137742Y1 (Ring) PN: 137742Y10 (Ring) PN: 137742Y11 (Ring) PN: 137742Y12 (Ring) PN: 137742Y2 (Ring) PN: 137742Y20 (Ring) PN: 137742Y21 (Ring) PN: 137742Y22 (Ring)