Part Number 677-0-51-300 Locking System Lower Eqd Rh in stock with ready to ship. Get an instant quote for Eurocopter American part number 677-0-51-300 by filling form below with your desired order quantity, targeted price and the expected order-fulfilment date. Get instant quote for 677-0-51-300. Our dedicated account manager will get back to you within 15 minutes.