; (4) a review of the safety recommendations of the National Transportation Safety Board related to general aviation accidents since 2000; (5) an assessment of the responses of the Federal Aviation Administration and the general aviation community to the safety recommendations of the National Transportation Safety Board related to general aviation accidents since 2000; (6) an assessment of the most common general aviation safety issues; (7) a review of the total costs to the Federal Government to conduct investigations of general aviation accidents over the last 10 years; and (8) other matters the Administrator or the Chairman considers appropriate. (c) Recommendations and actions To address general aviation safety Based on the results of the study required under subsection (a), the Administrator, in consultation with the Chairman, shall make such recommendations, including with respect to regulations and enforcement activities, as the Administrator considers necessary to— (1) address general aviation safety issues identified under the study; (2) protect persons and property on the ground