Contributor - Accidents and Regulations

Contributor - Accidents and Regulations

Gordon Gilbert

NavCanada has temporarily suspended use of new International Civil Aviation Organization (ICAO) “climb via SID” and “descend via Star” phraseology it had adopted on April 27. The agency said the move was made “out of concern over altitude deviations we were seeing in the system and the unforeseen large increase in workload as a result. We are continuing to communicate with airlines, aircraft operators and our employees as we revert to the phraseology rules that were in place prior to this change.​” That clearance phraseology includes both lateral path as well as vertical constraints.


Previously, ICAO adoption of the new phraseology signaled international acceptance of “climb/descend via” clearances that the <a href="http://www.ainonline.com/aviation-news/2014-04-07/climb-phraseology-becomes-operational">FAA implemented in 2014</a>, but the effort to harmonize ATC phraseology did not change some key differences in ICAO-member specific procedures. &nbsp;


When an FAA controller issues a “descend via” clearance, it tacitly cancels any ATC-assigned speed restrictions, said NBAA's ATC, Airspace and Flight Technologies Working Group chairman Rich Boll. When NavCanada issues a “descend via” clearance, the controller expects pilots to continue to comply with any ATC-assigned speed, rather than&nbsp;the speed(s) published on the chart, he said.

News, issues, personnel, equipment and developments about air traffic management.

NavCanada Suspends 'Climb/Descend Via' Clearances

ICAO adoption of the new phraseology signaled international acceptance of “climb/descend via” clearances that the FAA implemented in 2014.

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News and issues relating to international air transport and cargo carriers, national airlines and regional airlines, including aircraft, engines, personnel, acquisitions, accidents, safety, security and training.

News and issues relating to business, corporate and private aviation, primarily regarding turbine-engine-powered airplanes and helicopters. Subjects include aircraft, engines, maintenance, operations, personnel, acquisitions, accidents, safety, security, and training.

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Issues regarding financing of aircraft; aviation insurance; tax issues for aircraft operators; new companies and people in the aviation financing and insurance industries.

News about bills, laws, regulations and other governmental decisions affecting aviation and aerospace. Topics include FAA re-authorizations, taxes on fuel and aviation activities, environmental legislation, ICAO decisions, governmental mediation of labor conflicts and World Trade Organization disputes and decisions.

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News and issues relating to civil and military unmanned aircraft systems (UAS), unmanned aerial vehicles (UAVs) and remotely piloted aircraft systems (RPAS) of all kinds and sizes, including those used for intelligence, surveillance and reconnaissance (ISR), combat (unmanned combat air vehicles, or UCAVs), law enforcement, research and other applications. Of particular focus is the FAA's planned integration of UAS into the U.S. national airspace system.

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News and issues concerning general aviation, specifically airplanes and helicopters powered by piston and alternative engines (i.e., non-turbine powered aircraft). Subjects include aircraft, engines, personnel, acquisitions, accidents, safety, security and training.

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