The National Transportation Safety Board has announced a Direct Final Rule to better narrow the focus of the notification requirement in 49 C.F.R. § 830.5(a)(10) concerning certain resolution advisories. NTSB regulations currently require aviation operators to report all Airborne Collision and Avoidance System (ACAS) resolution advisories issued to an aircraft operating in class A airspace, as well as any other resolution advisory where compliance with the advisory is required to avert a substantial risk of collision between two or more aircraft. Review of notifications received under the rule has shown that the scope of the requirement can be reduced while still providing the NTSB notice of events that may benefit from an independent safety review. Therefore, after the change takes effect, operators will only be required to report ACAS resolution advisories issued when an aircraft is being operated on an instrument flight rules flight plan and compliance with the advisory is necessary to avert a substantial risk of collision between two or more aircraft.
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