Please fill out the form below for Xfmr 440Y 6 and get a quote for part number 677-1683-000 by Collins Avionics Service Centre, please include required quantity along with expected turn around time. Our knowledgeable account manager will reply you shortly. Also check for the related parts for part number 677-1683-000. ASAP Aerospace distributes nose to tail NSN components, sub-assemblies, and assemblies for the aerospace and aviation industry.