issues (1) In general Each Certificate Management Office within the FAA shall immediately notify the National Transportation Safety Board in any instance in which a part 121 air carrier falling under its supervision completes an unscheduled landing at any airport in the United States, including any instance in which an airplane returns to its airport of origin after takeoff before or without completing its scheduled flight, in which a mechanical issue was a factor. (2) Content The notification described in paragraph (1) shall include any information available about the cause of the unscheduled landing. (f) NTSB analysis and report The National Transportation Safety Board, in collaboration with the FAA, shall analyze information in the notifications it receives in subsections (d) and (e) of this section, for the purpose of identifying any trends or emerging concerns with any individual air carriers. Not less than once per year, the National Transportation Safety Board shall submit to the Committee on Transportation and Infrastructure of the House of Representatives and the Committee on Commerce, Science, and Transportation of the Senate a report on its analysis, the findings of its analysis, and any safety recommendations resulting from the analysis. (g) Definitions In this section, the terms major alterations , airframe , propeller , and appliance have the meanings given such terms in part 1 of title 14, Code of Federal Regulations. 11. Review of FAA’s Aviation Safety Inspection Program (a) Audit by the Department of Transportation Inspector General Not later than 6 months after the date of enactment of this Act, the Inspector General of the Department of Transportation shall initiate a review of the FAA’s August 2017 Flight Standards reorganization and its aviation safety inspection program. (b) Review The review shall include an evaluation of— (1) the FAA Flight Standards reorganization from a geographic-based system to a functional-based system