The foundation of international civil aviation regulation is the Convention on International Civil Aviation, commonly known as the Chicago Convention, which was signed in 1944. The International Civil Aviation Organization (ICAO) was established to manage the principles and techniques of international air navigation and to foster the planning and development of international air transport.

The core regulatory mechanism of ICAO involves the adoption of International Standards and Recommended Practices (SARPs). These are contained in the Annexes to the Convention. Annex 6, titled Operation of Aircraft, was first adopted by the ICAO Council on 10 December 1948, pursuant to Article 37 of the Convention. Article 37 obligates Contracting States to collaborate in securing the highest practicable degree of uniformity in regulations, standards, and procedures to facilitate and improve air navigation.

The Annexes are composed of two distinct types of specifications, which define the obligations of the member States:

• Standards: These are specifications for physical characteristics, configuration, matériel, performance, personnel, or procedures, the uniform application of which is recognized as necessary for the safety or regularity of international air navigation. Contracting States must conform to Standards in accordance with the Convention. If compliance is impossible, Article 38 of the Convention requires the State to notify the Council of any differences between their national regulations and the International Standard.

• Recommended Practices: These are specifications similar to Standards, but their uniform application is recognized as desirable in the interest of safety, regularity, or efficiency, rather than mandatory. States are urged to endeavor to conform to these practices.

 

Introduction Role and Purpose ICAO Annex 6

Sofema Aviation Services (SAS) Considers the fundamental role served by ICAO annex 6 and how this sets the standard of aviation operations worldwide.

Introduction

Annex 6 serves as a critical bridge between the airworthiness of the aircraft (governed by Annex 8) and the actual conduct of flight operations, ensuring that a certified aircraft is operated safely within its approved limitations.

 

Purpose of Annex 6

The primary purpose of Annex 6, Part I, is to contribute to the safety of international air navigation by providing criteria for safe operating practices.

• While the intrinsic safety of an aircraft is defined by its airworthiness certification under Annex 8, operational safety requires complementary standards.

 

• The level of airworthiness is not fully defined solely by Annex 8; it requires the application of the operational standards in Annex 6 to maintain that level of safety during active service.

 

• Beyond safety, the Annex aims to contribute to the efficiency and regularity of international air navigation. It achieves this by standardizing operational requirements across borders.

 

• When States implement these Standards, it encourages other States to facilitate the passage of aeroplanes over their territories, knowing that those aircraft are operating in conformity with globally recognized safety criteria.

Structural Evolution

Historically, the Annex initially distinguished between scheduled international air services and non-scheduled international operations.

However, modern iterations of the Annex no longer differentiate between the two in terms of safety standards.

• Whether a flight is a scheduled airliner or a charter operation, the objective remains the same: ensuring the highest level of safety for passengers and crew.

The Annex also establishes the responsibilities of the State of the Operator.

• It requires the State to establish a system for the certification and continued surveillance of the operator, ensuring that the required standards of operations are maintained.

This shifts the focus from simply inspecting aircraft to overseeing the competence and organizational structure of the airline operating them.

 

 

Structure of Annex 6

Annex 6 is organized into three distinct parts to address the different sectors of aviation operations. While the provided document specifically details Part I, the general structure of the Annex is as follows:

1. Part I: International Commercial Air Transport – Aeroplanes This part outlines the standards and recommended practices for the operation of aeroplanes by operators authorized to conduct international commercial air transport operations. It covers a wide range of operational aspects, including flight preparation, performance limitations, instruments and equipment, maintenance, and flight crew qualifications.
2. Part II: International General Aviation – Aeroplanes This part addresses operations that fall outside the scope of commercial air transport, specifically for general aviation aeroplanes. It ensures that non-commercial international flights also adhere to baseline safety standards suited to their specific operational profile.
3. Part III: International Operations – Helicopters Recognizing the unique aerodynamic and operational characteristics of rotary-wing aircraft, Part III provides specific standards for both commercial and general aviation operations involving helicopters.

Scope and Applicability

The Standards and Recommended Practices contained in Annex 6, Part I, are specifically applicable to the operation of aeroplanes by operators authorized to conduct international commercial air transport operations.

This applicability encompasses two main categories of operations:

1. Scheduled international air services.
2. Non-scheduled international air transport operations for remuneration or hire.

Together, these categories cover all international air transport operations conducted for remuneration or hire by aeroplanes.

A critical aspect of applicability involves the distinction between the State of Registry and the State of the Operator.

• Traditionally, the State of Registry retains functions and duties under the Convention. However, in modern aviation involving leased, chartered, or interchanged aircraft, the State of Registry may be unable to adequately fulfill its responsibilities if the aircraft is operating primarily in another State.

• In such cases, the Annex facilitates the transfer of certain oversight functions from the State of Registry to the State of the Operator through an agreement (often referred to as an Article 83 bis agreement).

The Annex applies to "aeroplanes," defined as power-driven heavier-than-air aircraft deriving lift chiefly from aerodynamic reactions on surfaces which remain fixed under given conditions of flight.

Key Definitions

To ensure uniform interpretation of the standards, Chapter 1 of Annex 6 provides precise definitions for key terms used throughout the document.

1. OperatorThe "Operator" is defined as the person, organization, or enterprise engaged in or offering to engage in an aircraft operation. This definition is central to the Annex, as the operator bears the primary responsibility for the safety of the flight, the maintenance of the aircraft, and the training of the crew.
2. State of the OperatorThis refers to the State in which the operator's principal place of business is located. If the operator has no such place of business, it refers to the operator's permanent residence. The State of the Operator is responsible for issuing the Air Operator Certificate (AOC) and for the continued surveillance of the operator's activities.
3. State of RegistryThe "State of Registry" is the State on whose register the aircraft is entered. While the State of the Operator oversees the airline, the State of Registry is traditionally responsible for the airworthiness of the individual aircraft, although some of these duties may be transferred under Article 83bis arrangements.
4. Operational Control"Operational Control" is the exercise of authority over the initiation, continuation, diversion, or termination of a flight in the interest of the safety of the aircraft and the regularity and efficiency of the flight. The operator or a designated representative exercises this control. Responsibility for operational control is delegated only to the pilot-in-command and to a flight operations officer/flight dispatcher, depending on the approved method of supervision.
5. Safety Management System (SMS)An SMS is defined as a systematic approach to managing safety, including the necessary organizational structures, accountability, responsibilities, policies, and procedures. Annex 6 requires operators to establish an SMS to identify hazards and manage safety risks. This includes establishing a flight data analysis programme for large aeroplanes (over 27,000 kg) to proactively improve safety performance.

Next Steps

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