Aviation Safety Letter: Issue 4/2019

The Aviation Safety Letter (ASL) is going through some changes. Previously, the ASL was only available in PDF, but starting with issue 3/2019, it’s now also available in HTML. This change makes it easier to share articles with others—but more importantly, will make it easier to search for specific topics.

You’ll notice that the ASL’s look has been updated. If you receive an ASL e-bulletin notification email, you’ll soon find an improved email with links directly to content. If you aren’t subscribed, we encourage you to sign-up online.

Have a great aviation photo? Send it to TC.ASL-SAN.TC@tc.gc.ca for a chance to be featured on the cover page of an upcoming issue of the ASL!

An old dog can learn new tricks—leveraging a growth mindset in aviation

Cognitive skills, relevance, recency, frequency, decision-making, safety briefings, training, growth mindset, continuous journey of learning and discovery.

Ultralight flying safety begins with you

General aviation, ultralight, basic ultralight aircraft (BULA), advanced ultralight aircraft (AULA), know your limits, pilot responsibility.


The presence of satellites in general aviation

Global Navigation Satellite System (GNSS), WAAS, technical incapacity, external portable receivers, human factors.

IFR phraseology guide

NAV CANADA, VFR phraseology guide, Ground traffic phraseology guide, IFR phraseology guide, communications, best practices, recommended phraseology to enhance pilot safety, training tool for flight schools, airport operators and aviation stakeholders.


AIP Canada (ICAO) and TC AIM

NAV CANADA, pre-flight and in-flight information, TC AIM offers educational reference material, AIP Canada (ICAO), aircraft operation in Canadian airspace, integrated AIP.

Visual flight rules flight into deteriorating weather and collision with terrain—TSB final report A18P0090

Cessna 182P, VFR, mountainous terrain, deteriorating weather. (See PDF for condensed version)


Mid-air collision—TSB final report A18O0150

Cessna 150G, Piper PA-42 Cheyenne III, collision, left-wing struck, circuit pattern at uncontrolled airport, radio communications, see-and-avoid principle, airborne collision avoidance systems, transponders. (See PDF for condensed version)

Controlled flight into terrain—TSB final report A19C0016

Cessna 208B Caravan, CFIT, VFR, instrument meteorological conditions, winter weather, whiteout, disorientation. (See PDF for condensed version)


Poster—Make your weather decision while you still have a choice (PDF, 443 KB)

Weather conditions, pilot-decision making, pre-flight, planning, before takeoff, plan alternatives, flight plan or itinerary, don’t push your limits.



The Aviation Safety Letter is published by Transport Canada, Civil Aviation. The contents do not necessarily reflect official government policy and, unless stated, should not be construed as regulations or directives.

Letters with comments and suggestions are invited. All correspondence should include the author’s name, address and telephone number. The editor reserves the right to edit all published articles. The author’s name and address will be withheld from publication upon request.

Please address your correspondence to:

Jim Mulligan, Editor
Aviation Safety Letter
Transport Canada (AARTT)
330 Sparks Street, Ottawa ON K1A 0N8
E-mail: TC.ASL-SAN.TC@tc.gc.ca
Tel.: 613-957-9914
Internet: canada.ca/aviation-safety-letter


Some of the articles, photographs and graphics that appear in the Aviation Safety Letter are subject to copyrights held by other individuals and organizations. In such cases, some restrictions on the reproduction of the material may apply, and it may be necessary to seek permission from the rights holder prior to reproducing it. To obtain information concerning copyright ownership and restrictions on reproduction of the material, please contact the Aviation Safety Letter editor.

Note: Reprints of original Aviation Safety Letter material are encouraged, but credit must be given to Transport Canada’s Aviation Safety Letter. Please forward one copy of the reprinted article to the editor.

Electronic distribution:
To subscribe to the Aviation Safety Letter e-Bulletin notification service.

To purchase a Print-on-Demand (POD) version (black and white), please contact:

The Order Desk
Transport Canada
Toll-free number (North America): 1-888-830-4911
Local number: 613-991-4071
E-mail: MPS1@tc.gc.ca

Sécurité aérienne — Nouvelles est la version française de cette publication.

© Her Majesty the Queen in Right of Canada, as represented by the Minister of Transport (2019).

ISSN: 0709-8103
TP 185E