Airworthiness Directives: Overview
Airworthiness Directives (ADs) are a set of legally enforceable rules that apply to aircraft and the following aircraft products: engines, propellers, and equipment, such as; parachutes, seat belts, and fire extinguishers.
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Canadian ADs are issued by the Minister pursuant to the conditions prescribed in Canadian Aviation Regulation, Part V, Subpart 93 (CAR 593). Pursuant to CAR Part VI, Subpart 5, section 84 (CAR 605.84) and the further details of CAR Standards (Airworthiness Manual) 593 and 625, the continuing airworthiness of a Canadian aircraft is contingent upon compliance with all applicable ADs. Failure to comply with the requirements of an AD can cause the certificate of airworthiness of the aircraft to be out of force. Applications for an alternative means of compliance (AMOC) with the requirements of an AD must be made in accordance with CAR Standard 625, Appendix H.
https://tc.canada.ca/en/corporate-services/acts-regulations /list-regulations/canadian-aviation-regulations-sor-96-433/standards/standard-625-appendix-h-airworthiness-directives-canadian-aviation-regulations-carsCANADIAN AVIATION REGULATIONS
An Airworthiness Directive contains, at a minimum, the following information:
Identification of an unsafe condition.
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Compliance time for the required action(s).
Effective date.
An Airworthiness Directive is issued in the following cases:
An unsafe condition has been determined to exist in an aircraft because of a deficiency in the aircraft, or an engine, propeller, part, or appliance installed on this aircraft.
The condition is likely to exist or develop in other aircraft of similar type.
Application and responsibilities of an Airworthiness Directive are as follows:
The ADs applicable to an aircraft are those issued or adopted by the State of Registry of this aircraft.
No person may operate an aircraft to which an AD applies, except in accordance with the requirements of that AD, unless otherwise agreed with the Civil Aviation Authority of the State of Registry.
Distribution:
Upon issue, Transport Canada ADs are distributed to the registered owners of affected Canadian aircraft.
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There are other optional entities in the Special Interest Groups module (SIGS) to which ADs are forwarded, depending upon the circumstances
CAWIS (SIGS) SPECIAL INTEREST GROUPS (SIGS) MODULEMODULE
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