Part Number O540B1A5-7523-OH Piper Oh in stock with ready to ship. Get an instant quote for Cessna Aircraft Company part number O540B1A5-7523-OH by filling form below with your desired order quantity, targeted price and the expected order-fulfilment date. Get instant quote for O540B1A5-7523-OH. Our dedicated account manager will get back to you within 15 minutes.