Each ACAM Inspection requires verification on a sample of a number of key airworthiness risk elements (key airworthiness elements), defined in AMC M.B. 303 (b. A detailed definition of individual KREs is contained in Appendix III to GM1 to M.B.303(b) which also provides supporting information, lists typical items and regulatory references. For each KRE, the verification sample shall be significant and representative of the areas of greatest attention. Therefore, the VERIFICATIONS do not necessarily concern “all” elements relating to a particular KRE (e.g. “all” parts with limited life, or “all” airworthiness requirements) but a significant sample of them, taking into account the time and resources actually budgeted. The identification of this sample falls within the competence of the professional(s) in charge of the ACAM inspection and is selected by it in such a way as to be significant and representative within the population and in the specific reference context and appropriate in terms of the need in any case to ensure the achievement of the objectives of the ACAM programme itself (ref. AMC/GM relating to point M.B.303(b)).