CIRCULAR 1984 FLIGHT CREW FATIGUE AND FLIGHT TIME LIMITATIONS INTERNATIONAL CIVIL AVIATION ORGANtZATION A MONTREAL CANADA Approved by the Secretary General and published under his authorify Sixth Edition, 1984 Supersedes Circular 52-ANl4715
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FOREWORD 1. Annex 6, Part 1 to the Convention on International Civil Aviation, which deals with the "Operation of -4ircraf t" In "Lnternational Commercial Air Transport", drf ines a minimum acceptable level of safety for such operations. To thls end it specifies the type 0 operating supervision which must be provided, certain basic operational procedures which ,lust 5e followed, the basic duties of certain flight crew members, etc. Since one of the Elore ircportant considerations pertaining to the safety ot an aircraft operation Ls the ,roticiency of the crew, Annex 1 specizies that each flight crew member shall have demonstrated his general proficiency in obtaining an appropriate licence, and Annex 6, Part I specifies that this shall be supplemented by additional training and checking both to ensure the maintenance of this proficiency and to ensure continuing familiarity with the ypes ot aeroplane used and the routes flown. 2. While such measures help to ensure a high state of competence of flight crew members, the effectiveness with which this competence is available for use depends upon each crew member's being sufficiently well rested to utilize his capabilities efficiently. Otherwise he may not respond to the degree that his proficiency should ensure, but may make errors uf judgement or action such as are associated with much lower degrees of proficiency than he has attained. This effect can be aggravated by various combinations of untavourable operational circumstances, but the continuation of any task long enough under even the most favourable circumstances will ultimately produce fatigue and consequent loss of efficiency. Consequently a Standard has been included in Annex 6, Part 1 to require the tormulation of rules limiting the flight time and flight duty periods of flight crew members. 3. The purpose of this Circular is to indicate the manner in which States have implemented the Standard of Annex 6, Part I in this respect. The material contained herein is provided for the information of Contracting States. 4. It will be noted that there is considerable variation both in the manner in which the regulations contained herein are stated, their scope and their applicability. In some cases regulations are developed and issued by a State while in others an operator is permitted to develop detailed rules, which must be submitted to the State for approval. Some regulations apply to pilots only, others to flight crew and some cover all crew members. In this connexion it should be noted that in Annex 6, Part I a "crew member" is defined as a person assigned by an operator to duty on an aircraft during flight time, and that a "flight crew member" is defined as a licensed crew member charged with duties essential to the operation of an aircraft during flight time. The provisions of Annex 6, Part I, in relation to flight and duty time limitations, apply only to "flight crew members". 5. Indicative of the fact that "flight time" is only one of several factors which can contribute to fatigue are those regulations by States which differentiate between the types of aircraft used, types of routes and general operating conditions encountered on routes. b. This Sixth Edition of Circular 52-AN/4 7 contains the regulations of those States that have responded to the most recent request for up-to-date material. 1. In so far as possible, the texts of States Regulations have been reproduced as received. h. To assist ICAO In keeping this Circular up to date, States are urged to notify dny changes and provide any additional material as and when these become available.
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