; and (4) not later than 1 year after the date of enactment of this Act, issue to Congress a report on the progress of the work described in paragraph (1). (d) NTSB recommendation (1) In general The Administrator shall implement the recommendation of the National Transportation Safety Board numbered as A–18–27 and issued on October 11, 2018, and, not later than 1 year after the enactment of this Act, the Administrator shall issue to Congress a report on the status of the implementation. (2) Consideration In implementing this recommendation, the Administrator shall consider any relevant findings identified pursuant to section 334 of the FAA Reauthorization Act of 2018 ( Public Law 115–254 ). 4. Investigations for covered events (a) In general Once implementation of section 3(b) of this Act is complete, the National Transportation Safety Board may initiate investigations of covered events to determine risk factors specific to the airport at which such an event occurred and other elements of the National Airspace System that may contribute to the cause of the event. The National Transportation Safety Board may also elect to consider multiple events in a single report as part of a special investigation or study to examine safety factors contributing to these events. (b) Additional investigative information In addition to any investigation that the National Transportation Safety Board is conducting with respect to any specific covered event, the NTSB shall utilize voluntarily provided safety information in its evaluation of associated risk in the National Airspace System and protect such information from public release in accordance with section 1114(b)(3) of title 49, United States Code. (c) Content The review and analysis shall examine factors present at the time of any covered event at such airport, including— (1) challenges pilots perceive when flying into and out of the airport; (2) challenges that air traffic controllers face when working at the airport