All Turbine powered aircraft appraisals are compliant under the USPAP rules of engagement. The Uniform Standards of Professional Appraisal Practice (USPAP) was established to promote and maintain a high level of public trust by establishing requirements for aircraft appraisers. The Appraisal Standards Board (ASB) of the Appraisal Foundation develops, publishes, interprets and amends the USPAP on behalf of appraisers and users of appraisal services. USPAP calls for the highest standards of professional ethics. USPAP compliant appraisals must be conducted by a qualified appraiser who has specialized knowledge, understanding and has successfully completed the stringent USPAP intensive course work while displaying proficiency. Standards 7 and 8 establish stringent requirements for the appraiser to develop and communicate their analyses, opinions and conclusions to the intended users of their services in a manner that is meaningful and not misleading.
While agencies such as PAAO offer training, testing and certification in aircraft appraisal, USPAP is not an agency which trains individuals in aircraft appraisal or which awards aircraft appraisal certification. Instead, USPAP addresses the ethical and performance obligations while providing stringent guidelines and requirements for highly experienced Aircraft Appraisers to offer USPAP endorsed aircraft appraisal. South America, Europe and Asia have accepted USPAP as the standard of practice for their membership.