In a Notice of Proposed Rulemaking published today the NTSB is proposing to amend the notification and reporting requirements of 49 CFR 830.5(a)(10) with regard to Airborne Collision and Avoidance System (ACAS) advisories. Currently the regulation requires ACAS advisory reporting “[w]hen 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” or “to an aircraft operating in class A airspace.”
Under the proposed amendment, the following ACAS advisories would need to be reported:
- 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; or
- To an aircraft operating in class A airspace, unless the advisory received only instructs the pilot to “monitor vertical speed.”
According to the NTSB, it “believes the proposed change to section 830.5(a)(10) will continue to assist in achieving the NTSB’s purpose of improving aviation [[Page 76688]] safety, while ensuring the language of the rule only requires notifications regarding specific ACAS advisories that the NTSB may seek to investigate.”
Comments to the proposed amendment are due no later than February 6, 2012. If you would like more information, you may contact Scott Dunham, National Resource Specialist–ATC, Office of Aviation Safety, (202) 314-6387.
