AISI is a world-wide leader in aviation appraising with a well-established reputation for accurate, responsive, reliable and consistent aircraft valuations. Our expert staff include International Society of Transport Aircraft Trading (ISTAT) and American Society of Appraisers (ASA) certified appraisers with extensive experience in all levels of the industry. We provide an array of appraisal services to most major airlines, aircraft leasing companies, banks, and major private investment pools, appraising an average of over 2,500 aircraft annually with a total value of well over US$50,000,000,000.