Part Number 80-369D23017-3 Ring Instl Sta 137 50 Upper in stock with ready to ship. Get an instant quote for Md Helicopters Inc part number 80-369D23017-3 by filling form below with your desired order quantity, targeted price and the expected order-fulfilment date. Get instant quote for 80-369D23017-3. Our dedicated account manager will get back to you within 15 minutes.