PTA has provided service for 29 years to satisfied customers around the globe from the heart of air capitol, Wichita, KS. Plus 45 years of direct hands on experience equals superior service for your aircraft instrument overhaul, repair, exchange and outright purchase for your aircraft re-certification needs. Now very popular, instrument dial face overhaul. Send us your instruments and within a few days we'll replace the old yellowed dials with the new white face. Altimeters, Instrument Cores, Manifold Fuel Flows, Vertical Speeds, Overhauled Avionics, etc.