Latest Dispatches
Recently issued navigability instructions and urgent airworthiness directives.
Note: Only directives marked with the consultable icon are currently available for online viewing. For urgent safety directives requiring immediate attention, refer to the By Reference index.
OSAC publishes airworthiness directives, known as Consignes de Navigabilité, to ensure that civil aircraft operating within the region maintain the highest safety standards. These dispatches are issued whenever a condition arises that could affect the continued airworthiness of a particular aircraft type, engine, or component. Operators and maintenance personnel rely on these timely notifications to stay informed of required inspections, part replacements, or modifications. By following each directive within its specified compliance window, the aviation community works together to prevent potential failures before they occur. This proactive approach to safety management reflects the broader commitment to reliability that underpins all regulatory oversight in civil aviation.
Urgent airworthiness directives are given special prominence on the dispatches page because they address conditions that demand swift corrective action. These may involve critical systems such as flight controls, landing gear, or engine components where a failure could have immediate safety consequences. When an urgent CN is published, operators are expected to act within a shortened compliance period, sometimes before the aircraft’s next flight. Highlighting these entries helps maintenance teams quickly identify the most pressing items among the broader list of directives. This tiered system of urgency ensures that resources are directed first toward the highest-risk scenarios, reinforcing a culture of vigilance and rapid response across the aviation sector.
Beyond urgent notices, the dispatches page provides a comprehensive chronological record of all standard airworthiness directives. Each entry includes a reference number, applicable aircraft or component, and a clear description of the required action along with its compliance timeline. Operators use this structured listing to plan maintenance schedules, track recurring inspections, and verify that all relevant directives have been addressed for their fleet. Because aviation regulations evolve continuously, having a single authoritative source for these documents simplifies compliance management. The chronological arrangement also helps users trace the history of requirements for a given aircraft type, supporting both current operations and long-term maintenance planning.
Searching for a specific directive by its reference number or by manufacturer is made straightforward through the tools available on the dispatches page. This functionality is essential for maintenance teams who need to locate a particular CN quickly while working under time constraints. The search capability reduces the need to manually scan through long lists of entries, allowing personnel to focus directly on the applicable document. Whether preparing for an upcoming inspection or responding to a newly issued urgent notice, the ability to retrieve precise information efficiently supports safer and more effective maintenance practices. This user-focused design reflects the broader goal of making regulatory information accessible and actionable for all aviation professionals.
Recent Dispatches
| Reference | Title | Responsible Party | Type | Date | Status |
|---|---|---|---|---|---|
| EU-2018-0265-E | Engine – Exhaust Valve – Replacement | BRP-ROTAX GmbH & Co. KG | ROTAX 914 | 7 December 2018 | Standard |
| --AD INDEX (AB) | Summary of instructions issued from 3 January 2018 | All Responsible Parties | Index | 1 August 2018 | Standard |
| CF-2004-22 (B) | Bombardier CL-600 "Challenger" – Angle-of-attack vane | BOMBARDIER INC. | CL-600 | 13 August 2018 | Urgent |
About These Dispatches
This page lists the most recently issued Consignes de Navigabilité (CN) — airworthiness directives published by OSAC for civil aviation operators and maintenance personnel. Dispatches are organized chronologically, with the newest entries appearing first.
Urgent CNs are highlighted for immediate attention and typically address safety-critical conditions requiring prompt corrective action. Standard directives follow the regular compliance timeline specified within each document.
To locate a specific directive by its reference number or by manufacturer, use the By Reference or By Manufacturer indexes.