Iec ts 62143 2002

TECHNICAL SPECIFICATION IEC TS 62143 First edition 2002 07 Electrical installations for lighting and beaconing of aerodromes – Aeronautical ground lighting systems – Guidelines for the development of[.]

Objective

This clause aims to guarantee that individuals responsible for any activity or involved in any phase of an AGL system's lifecycle possess the necessary competence to fulfill their duties effectively.

Requirements

It is advisable for the relevant administration or aerodrome authority to promote the establishment of a formal and structured competency training program This program should feature multiple tiers that progressively enhance individuals' skills, ensuring a recognized level of competency for those who successfully complete it.

All individuals engaged in activities, including management and maintenance, must possess appropriate and verifiable training, technical knowledge, experience, and qualifications relevant to their specific roles Those working with AGL equipment must be aware of the associated risks and safety procedures The training, experience, and qualifications of all personnel must be justified based on relevant competence factors.

The justification shall be recorded in appropriate documentation (see 5.3.2 g)).

NOTE The following competence factors should be addressed when assessing and justifying the competence of persons carrying out their duties:

• engineering appropriate to the application area;

• engineering appropriate to the technology (e.g mechanical, electrical/electronic/software engineering);

• safety engineering appropriate to the technology;

• knowledge of the legal and safety regulatory framework;

• knowledge of the operational aspects related to the AGL system at the aerodrome;

• the consequences in the event of a failure of AGL equipment;

• the consequences of failure to adhere to safety procedures when working on AGL equipment;

• the novelty of the design, design procedures or application;

• previous experience relevant to the specific duties to be performed and the technology being employed;

• relevance of qualifications to the specific duties performed.

To ensure the operational readiness of an AGL system at an aerodrome, safety must be integral throughout its lifecycle Organizations involved must cultivate a safety-oriented culture at all management and operational levels It's important to note that while technical protection devices are valuable, they do not guarantee safety; effective safety procedures and the vigilance of personnel are irreplaceable The following subclauses detail the essential components of a safety management system that every organization associated with an AGL system's lifecycle should implement.

Objective

This clause aims to outline and record all management and technical activities throughout the AGL system safety lifecycle that directly affect operational safety at aerodromes, while also ensuring the safety of personnel involved in these activities.

LICENSED TO MECON Limited - RANCHI/BANGALORE FOR INTERNAL USE AT THIS LOCATION ONLY, SUPPLIED BY BOOK SUPPLY BUREAU.

Documentation

The documentation created in accordance with this technical specification must be managed under a suitable document control system Its development should commence prior to the conclusion of the evaluation phase of the AGL system safety lifecycle, with each document subject to review, modification, and approval by the aerodrome authority as required throughout the entire lifecycle.

For effective auditing, it is crucial to document all activities outlined in this technical specification The documentation must serve its intended purpose, provide a thorough description of the safety assessment, tests, systems, or equipment, and be accurate, concise, and easily understandable Additionally, it should be assessable and maintainable.

NOTE The majority of the documentation should be considered as “live” documents, i.e they are subject to review and revision throughout the lifecycle of the AGL system.

The documentation must include unique identifiers for easy referencing of its various sections, adhere to the specified titles and names outlined in the technical specification, and feature a revision index with version numbers to facilitate the search for relevant information, ensuring that the latest version of any document or information set can be easily identified.

NOTE 1 The physical structure of the documentation will vary depending upon a number of factors such as the size of the system, its complexity and the organisational requirements.

NOTE 2 If relevant, other documents, such as applicable regulations and other standards, should be referenced.

AGL safety plan

An AGL safety plan must be developed by the aerodrome authority, detailing the responsibilities and procedures for management and staff involved in the design, installation, or maintenance of an AGL system and its components.

NOTE The AGL safety plan focuses on safety It may be included in:

• a section in the Quality Plan entitled “AGL Safety Plan”,

• a separate document entitled “AGL Safety Plan”,

• several documents which are referenced in either of the above (e.g one document could be for the overall AGL system or one document for each component (e.g CCR), or

• an overall aerodrome safety management system.

The AGL safety plan must outline all management and technical activities related to the design, installation, or maintenance of an AGL system and its components It should specify the plan's scope, safety policies and strategies, evaluation methods, and communication processes to foster a culture of safety within the organization Additionally, the plan must identify the individual designated by the aerodrome authority as responsible for the AGL system and the owner of the safety plan It should also detail the roles of various persons, departments, and organizations involved in executing and reviewing safety procedures, including relevant licensing authorities and safety regulatory bodies, along with their interrelationships.

The document outlines essential safety procedures and assessment processes as specified in the AGL safety assessment plan, particularly for activities within the AGL system safety lifecycle phase It emphasizes the importance of ensuring that all personnel involved in the design, installation, or maintenance of the AGL system possess the necessary competencies for their respective responsibilities.

1) the training of persons in diagnosis and repair of failure and in system testing;

2) the training of operations staff;

3) the re-training of staff at periodic intervals or after prolonged absence from duty;

The article outlines plans for identifying and addressing cases of diminished capacity essential for ensuring safety It emphasizes the importance of procedures that analyze hazardous incidents to minimize the likelihood of recurrence Additionally, it highlights the need for thorough analysis of operations and maintenance performance.

1) procedures for recognising systematic failures and faults;

To ensure operational efficiency, it is essential to maintain a log that records demand and failure rates during operation and maintenance, allowing for comparisons with predicted conditions established during the system's specification and design phases This comparison facilitates an assessment of whether the actual dependability levels meet the required standards Additionally, there must be defined requirements for periodic reviews or audits of safety procedures to uphold safety standards effectively.

1) the procedures to be reviewed;

2) the required independence of the reviewers;

3) the procedures for initiating reviews (including routine, essential and emergency);

4) the minimum frequency of review for each activity;

5) the procedures for the analysis of the results;

6) the procedure for recommending corrective actions; k) the required safety approval process and authority for modifications; l) the procedures for initiating modifications as a result of recommendations arising from:

The analysis of hazardous events involves identifying incidents that could lead to potential hazards and implementing procedures for timely follow-up and effective resolution of recommendations This includes addressing findings from incident reports, conducting safety assessments, and performing verification and validation activities, as well as adhering to configuration management and change control procedures.

2) performance below the specified level of safety (i.e the actual performance gives rise to a risk level above that necessary to meet the level of safety);

3) systematic fault experience (both hardware and software);

4) new or amended safety legislation;

5) modifications to the AGL system or its use;

6) modification to any safety requirement;

7) analysis of maintenance and operations performance which indicates that the required level of safety is not being achieved;

MECON Limited, located in Ranchi and Bangalore, is authorized for internal use only, as supplied by the Book Supply Bureau This includes the procedures for maintaining precise documentation on potential hazards and the configuration management of the AGL system, which encompasses various essential activities.

1) the phase at which configuration control is to be implemented;

2) the procedures to be used for uniquely defining all constituent parts of an item

To prevent unauthorized items from entering operational service, it is essential to implement effective procedures Additionally, providing training and information to relevant external organizations, such as emergency services, about safety procedures and potential hazards is crucial.

5.3.3 Each of the components of the AGL safety plan shall be formally reviewed by the organisations concerned and agreement gained on the contents.

5.3.4 All those involved in implementing the AGL safety plan shall be informed of responsibilities assigned to them under the plan.

AGL safety assessment plan

An AGL safety assessment plan must be established to coordinate and conduct safety evaluations of the AGL system and its components, ensuring clear objectives for the assessments.

5.4.2 The person nominated in 5.3.2 c) shall approve the AGL safety assessment plan.

5.4.3 An AGL safety assessment plan shall be provided that identifies

• the scope of the safety assessment;

• the appropriate safety assessment that shall be carried out at all phases throughout the

• the outputs from each safety assessment at each lifecycle phase;

• the safety assessment team, including the nominated leader;

• the level of independence of the assessors within the safety assessment team;

• the competence of the assessors relative to the application;

• the safety bodies and other participants involved;

Safety assessments at each phase of the AGL system safety lifecycle must consider any updates since the last assessment, including changes made to the system or safety assessment strategies They should identify hazardous events and the sequences or failure modes that could lead to these events under foreseeable circumstances Additionally, all relevant human factor issues must be taken into account, along with an evaluation of the frequencies or probabilities of the identified hazardous events Finally, the potential consequences associated with these hazardous events should be thoroughly assessed.

MECON Limited, located in Ranchi and Bangalore, is authorized to use this material solely for internal purposes It is essential to assign a risk criticality classification for each hazardous event and to establish the necessary safety requirements.

NOTE 1 The frequency of the events or other criteria may be specified quantitatively or qualitatively.

There are various forms of safety assessments, and the selection should align with the task's scope, the technology used, and the necessary deliverables While specific safety assessments may have distinct names, such as preliminary hazard analysis, they all fundamentally represent a "hazard analysis." The generic term is frequently employed in this context Relevant guidelines and examples for safety assessments in technological systems can be found in IEC 60300-3-9 and IEC 61508-7.

Accident-initiating events to consider include component failures, procedural faults, human errors, and dependent failure mechanisms that can lead to accident sequences.

Eliminating hazards is essential, and risk reduction exercises must be conducted to enhance safety levels for each identified hazard.

When system design cannot adequately mitigate identified hazards, it is essential to explore operational procedures as an alternative method for lowering risk levels.

5.4.6 The safety assessment team leader shall approve the results acquired from a safety assessment.

5.4.7 The information and results acquired in subclauses 5.4.4 and 5.4.5 shall be documented in the AGL safety case (see 5.6).

The individual designated in section 5.3.2 c) is responsible for evaluating the activities and outcomes of each phase of the AGL system safety lifecycle to determine the achievement of objectives The findings from this assessment must be documented in the AGL safety case as a verification report, as outlined in section 5.5.4.

Verification plan

5.5.1 A verification plan shall be established, concurrently with the development, for each phase of the AGL system safety lifecycle and detailed in the appropriate and relevant documentation.

5.5.2 The verification plan shall provide and document or refer to the criteria, techniques and tools to be used in the verification process.

The choice of techniques and tools for a project is influenced by several key factors, including the project's size, complexity, and the novelty of both the design and technology involved.

5.5.3 Each verification process shall be performed in accordance with the verification plan.

5.5.4 A verification report shall be provided that contains evidence to show that the phase being verified has, in all respects, been satisfactorily completed.

AGL safety case

5.6.1 An AGL safety case document shall be developed that contains a history of every safety assessment that has been performed on the AGL system.

NOTE A safety case is sometimes presented in four parts that cover the following four aspects of the lifecycle: operational requirements, system design and manufacture, installation and commissioning, and operations.

5.6.2 For each safety assessment, the AGL safety case shall record the following information: a) where the safety assessment is used to determine safety requirements:

1) a description of the identified hazards, failure modes, etc.;

2) the determined risk and tolerability;

3) the safety requirements; b) where the safety assessment is used to validate that safety requirements have been met:

1) whether the safety requirements have been met or not;

2) evidence, or a reference to the source of the evidence, to support any safety claims in the bullet above, or tests that have been performed;

If safety requirements are not fulfilled, it is essential to outline the necessary mitigation measures or additional actions needed Additionally, a verification report must confirm that the safety assessment was conducted in accordance with the AGL safety assessment plan.

The AGL safety case must be consistently maintained and updated as necessary, incorporating key information such as the outcomes of any additional safety assessments, documentation of extra demands and failures identified during routine maintenance, details regarding the timing and causes of these demands along with the AGL system's performance under such conditions, and a record of any modifications made to the AGL system that could affect hazards outlined in the safety case.

The AGL system safety lifecycle details the sequential safety assessments required throughout the life of an AGL system, as illustrated in Figure 1 These assessments are essential for establishing safety requirements and procedures that ensure the safe operation of AGL equipment and maintain an acceptable safety level for personnel involved in AGL activities and aerodrome operations.

The AGL system safety lifecycle consists of distinct phases, represented by numbered boxes 1 to 12 in Figure 1 These phases are elaborated upon in subclauses 7.1 to 7.8 and summarized in Table 1.

Objectives

The primary goal of this clause is to systematically organize the phases of the overall safety lifecycle for an AGL system, ensuring that safety considerations are addressed at every stage.

6.1.2 The second objective of this clause is to determine the key information relevant to the safety aspects of the AGL system that shall be recorded throughout its lifecycle.

Requirements

The AGL system safety lifecycle, illustrated in Figure 1, serves as the foundation for demonstrating compliance with this technical specification Should an alternative lifecycle be utilized, it must be detailed in the AGL safety plan, ensuring that all objectives and requirements outlined in each clause of this specification are fulfilled.

6.2.2 Unless exempt, each phase of the AGL system safety lifecycle shall be addressed and the requirements met Justification for any exemption shall be recorded in the appropriate documentation.

• the objectives of the phase;

• the requirements in order to meet the objectives of the phase;

• the scope of the phase;

• the inputs to the phase;

• the outputs required to meet the objectives of the phase.

6.2.4 Each phase of the AGL system safety lifecycle shall be divided into elementary tasks with a well-defined input, output and activity for each phase.

6.2.5 The outputs for each phase of the AGL system safety lifecycle shall meet the objectives and requirements specified for each phase.

6.2.6 The AGL system safety lifecycle shown in Figure 1 indicates the safety assessments and safety procedures that shall be performed in each of the following lifecycle phases:

In Phase 1, known as the evaluation phase, initial system designs and concepts undergo assessment, while a preliminary hazard analysis identifies essential safety requirements This process takes into account design concepts, environmental factors, and relevant regulations and standards.

In Phase 2, known as the technical solution phase, the operational requirements of the AGL system are thoroughly analyzed This phase involves deriving safety requirements through hazard analyses for the entire AGL system, which are then allocated to specific components.

In Phase 3, known as the realization phase, the safety requirements are thoroughly verified during the design and manufacturing processes This phase also includes the planning stage, where potential hazards associated with the installation, commissioning, and operation of the AGL system are identified and assessed.

− Phase 4 – the installation phase (box 8), where the AGL system installation safety requirements and safety procedures are employed to protect the installer and the operational environment;

− Phase 5 – the commissioning phase (box 9), where the AGL system commissioning safety requirements are used in the commissioning of the system and the operational requirements are shown to be met;

In Phase 6, known as the operations phase, safety requirements and procedures for operational and maintenance activities are established to ensure the protection of both direct and indirect users, as well as maintainers This phase also involves implementing necessary measures to uphold safety standards during any modifications, which may entail restarting all or part of the lifecycle.

− Phase 7 – the decommissioning phase (box 12), where safety procedures are determined to protect aerodrome operations and staff dismantling the AGL system or a component of it.

The AGL system safety lifecycle, illustrated in Figure 1, offers a simplified perspective that omits certain details regarding safety assessments and procedures pertinent to specific phases and transitions in the development of safety assurance for the AGL system.

Operational requirements and design concept

Safety requirements to appropriate lifecycle phase

Safety requirement validation and mitigation

System component design and manufacture For each system component

Figure 1 – AGL system safety lifecycle

7 AGL system safety lifecycle phases in detail

Subclauses 7.1 to 7.8 detail specific processes illustrated in Figure 1, each representing a distinct phase in the lifecycle with associated inputs, actions, and outputs These subclauses offer comprehensive information on the necessary inputs, actions—including safety assessments—and outputs for each lifecycle phase Additionally, Table 1 summarizes the objectives and requirements outlined in all the clauses.

Incorporating the relevant regulatory authority early in the safety lifecycle process is beneficial, as statutory and local regulations, such as air navigation regulations, may apply.

Evaluation

The primary goal of this subclause is to thoroughly outline the purpose of the AGL system within its intended environment, which includes operational, physical, social, political, and legislative aspects, ensuring that subsequent lifecycle activities can be effectively carried out.

The second objective of this subclause is to identify hazards linked to the operational use of the AGL system, along with the event sequences that may lead to these hazards across all modes of operation and foreseeable circumstances.

7.1.1.3 The third objective of this subclause is to develop the initial safety requirements for the AGL system, including the mandatory or statutory requirements that shall apply.

7.1.2.1 A thorough understanding shall be acquired of the AGL system, or component as appropriate, and its operational purpose.

7.1.2.2 In accordance with the AGL safety assessment plan, the likely sources of hazards within the scope of the AGL system shall be identified by a preliminary hazard analysis.

To ensure compliance with safety and air navigation standards, it is essential to gather information on the current and applicable national and international safety regulations, air navigation regulations, and local aerodrome regulations Additionally, understanding environmental factors—operational, physical, social, political, and legislative—is crucial for effective management and decision-making.

The operational requirements must specify the level and characteristics of the AGL, taking into account the intended aerodrome operational capability, including weather conditions, flight operations minima, and available facilities Additionally, when taxiway guidance is necessary, the expected levels of aerodrome traffic flow, specifically aircraft movement rates, should also be considered.

Maintaining the information and results from identifying operational requirements is essential for tracking progress in addressing hazard and risk management issues outlined in the AGL safety case.

7.1.2.5 Hazards due to interaction with other systems (installed/to be installed) in the proximity of the AGL system or component, as appropriate, shall be considered.

7.1.2.6 The preliminary hazard analysis shall determine the mandatory or statutory safety requirements for the AGL system.

7.1.2.7 The information and results acquired in subclauses 7.1.2.1 to 7.1.2.6 shall be documented in the AGL safety case.

A verification report must be submitted, demonstrating that the phase has been successfully completed in all aspects This report should be included in the AGL safety case documentation.

Technical solutions

(See Boxes 2 and 3 of Figure 1)

7.2.1.1 The first objective of this subclause is to develop the safety requirements for the AGL system.

7.2.1.2 The second objective of this subclause is to allocate specific safety requirements to each component of the AGL system.

7.2.2.1 In accordance with the AGL safety assessment plan, a hazard analysis shall be performed to identify the safety requirements for the AGL system.

The hazard analysis must address several key aspects: it should incorporate the mandatory safety requirements established during the evaluation phase, identify the necessary safety functions for each recognized hazard, examine all potential failure modes that could lead to hazardous events, and include risk reduction measures integrated into the AGL system design and manufacturing Additionally, safety levels may be assigned in accordance with IEC 61508 standards.

7.2.2.3 The actual type of AGL system might not be known at this phase of the lifecycle.

The AGL system, utilized by aircraft and vehicles at aerodromes, presents several generic hazards that must be managed by responsible personnel Key risks include the potential for incorrect or misleading light patterns, including color displays, unexpected fluctuations in luminous intensity, and unintended activation or deactivation of the AGL, particularly those linked to runways.

NOTE The hazards listed above apply to the entire AGL system Other hazards may exist that depend upon the type of control system, the technology employed and its complexity.

The generic hazards associated with the safe movement of aircraft and vehicles at the aerodrome must be evaluated during the hazard analysis This assessment should consider the specific operational requirements and derive safety standards for the AGL system accordingly.

7.2.2.5 The measures taken and methods used to develop the AGL system safety requirements (including risk reduction) shall be documented in the AGL safety case.

7.2.2.6 The AGL system safety requirements shall be documented in the AGL safety case.

7.2.3 Requirements – System design requirements allocation

7.2.3.1 The safety functions necessary to achieve safety of the AGL and derived from the

AGL system safety requirements shall be allocated to the designated AGL system components.

7.2.3.2 In accordance with the AGL safety assessment plan, a hazard analysis shall be performed to determine and allocate specific safety requirements to the designated AGL system components.

Safety assessment techniques, such as availability, reliability, and redundancy calculations, must be utilized to confirm that the distribution of system safety requirements maintains the necessary overall safety level.

7.2.3.4 The measures taken and methods used to develop the allocated safety requirements shall be documented in the AGL safety case.

7.2.3.5 The safety requirements allocated to each AGL system component shall be documented in the AGL safety case.

Realisation

The objective of this subclause is to create an AGL system that conforms to all the applicable safety requirements and will satisfy the intended operational requirements.

In line with the AGL safety assessment plan, hazard analyses must be conducted for every component of the AGL system to ensure compliance with design and manufacturing standards, evaluate test procedures during the commissioning phase for factory-specific hazards and failure modes, identify new risks in the realization process, assess each failure mode that could lead to hazardous events, verify the effectiveness of risk reduction measures, and assign safety levels as per IEC 61508.

7.3.2.2 Safety assessments shall be performed as necessary in order to ascertain whether the overall system safety requirements and the allocated safety requirements have been met.

Mitigation by alternative means shall be determined where any safety requirements cannot be met by the system design.

7.3.2.3 The information and results acquired in subclauses 7.3.2.1 and 7.3.2.2 shall be documented in the AGL safety case.

Planning

(See Boxes 5, 6 and 7 of Figure 1)

7.4.1.1 The first objective of this subclause is to develop the safety requirements and procedures for the installation of the AGL system.

7.4.1.2 The second objective of this subclause is to develop the safety requirements and procedures for the commissioning of the AGL system.

The third objective of this subclause is to establish safety requirements for the operation and maintenance of the AGL system, ensuring the safety of both the system and the personnel involved in its use and maintenance.

In line with the AGL safety assessment plan, an AGL installation plan must be created, detailing the installation schedule, roles and responsibilities, and the outcomes of a hazard analysis to mitigate potential installation hazards It should also outline the installation procedures, including operational and health and safety protocols, as well as potential risks Additionally, the plan must specify the procedures for addressing failures and incompatibilities, along with the criteria for declaring the installation complete.

The AGL commissioning plan, developed in accordance with the AGL safety assessment plan, will outline the timing of the commissioning, define roles and responsibilities, and present the findings of a hazard analysis to mitigate potential risks It will also detail the commissioning procedures, including operational and health and safety protocols, assess the impact on aerodrome operations, and describe the commissioning strategy and techniques Additionally, the plan will specify the scope of the commissioning exercise, identifying the components of the AGL system that require validation prior to commencement and the relevant operational modes.

This document is licensed to MECON Limited for internal use in Ranchi and Bangalore, as supplied by the Book Supply Bureau It outlines the procedures for resolving failures and incompatibilities, as well as the criteria for declaring the commissioning complete, ensuring that all relevant safety requirements have been met.

7.4.4 Requirements – Operations and maintenance planning

7.4.4.1 In accordance with the AGL safety assessment plan, an AGL operations and maintenance plan shall be prepared.

NOTE See IEC 61821 for the maintenance requirements of an AGL constant current series circuit.

The AGL operations and maintenance plan must include the outcomes of a hazard analysis, which identifies the necessary routine actions and safety requirements to uphold the intended safety standards.

The AGL system plays a crucial role in operational safety by implementing necessary actions and constraints to prevent unsafe conditions and minimize accident risks It is essential to maintain accurate records and define the scope of maintenance activities, which must include stringent safety requirements Additionally, clear procedures should be established for responding to any hazards that may arise.

7.4.4.3 The AGL operations and maintenance plan shall be agreed with those responsible for the operation and maintenance of the AGL system.

7.4.4.4 The information and results acquired in 7.4.4.2 shall be documented in the AGL safety case.

Installation

The objective of this subclause is to ensure that the AGL system is installed in a safe manner.

NOTE Operational safety matters, such as clearances and procedures required in the vicinity of aircraft movements, should be addressed.

7.5.2.1 Installation of the AGL system shall proceed according to the AGL installation plan

7.5.2.2 The AGL safety case shall be updated if different or additional hazards become apparent as a result of the installation process.

Commissioning

The objective of this subclause is to ensure that the AGL system is validated and that the applicable AGL system safety requirements are met.

7.6.2.1 Commissioning of the AGL system shall proceed according to the AGL commissioning plan (see 7.4.3.1).

NOTE Certain AGL facilities may require verification of operational performance and/or approval for operational use by a regulatory authority.

When discrepancies arise between expected and actual results impacting safety, it is essential to document the analysis and decisions regarding the continuation of the commissioning process or the issuance of a change request in the AGL safety case.

Operations

(See Boxes 10 and 11 of Figure 1)

7.7.1.1 The first objective of this subclause is to operate and maintain the AGL system such that the designed level of safety is maintained.

7.7.1.2 The second objective of this subclause is to ensure that the level of safety is maintained during and after modification to the AGL system.

The AGL operations and maintenance plan, along with relevant procedures, will be executed to ensure operational safety This includes adhering to safety procedures specific to the AGL system, following maintenance schedules and safety protocols, maintaining accurate records, and conducting periodic audits to uphold safety standards.

7.7.3.1 The modification phase shall only be initiated under the procedures specified in the

AGL safety plan (see 5.3.2 k)) which details the following items: a) the identified hazards that may be affected; b) the proposed change; c) the reason for change.

Modifications to the AGL system may be necessary due to various reasons, including failure to meet safety standards, experiences of systematic faults, results from periodic safety audits, updates in safety legislation, planned changes to the AGL system, or alterations to overall system safety requirements.

In line with the AGL safety assessment plan, an impact analysis will be conducted to evaluate the effects of the modification, with the findings documented in the AGL safety case.

Any modifications deemed to affect the safety level of the AGL system must revert to the relevant phase of the AGL system safety lifecycle Following this, all subsequent phases should be carried out according to the procedures outlined in this technical specification.

Decommissioning

The objective of this subclause is to ensure that the level of safety is maintained during and after the decommissioning process of the AGL system or part thereof.

7.8.2.1 In accordance with the AGL safety assessment plan, a hazard analysis shall be carried out on the impact of the decommissioning and the results shall be documented in the

7.8.2.2 Prior to decommissioning taking place an AGL decommissioning plan shall be prepared.

The AGL decommissioning plan must outline safety procedures for the removal of the AGL system or its components from operational service, ensure the protection of the operational environment, and detail the dismantling and disposal processes for the decommissioned system.

NOTE The safety requirements of the decommissioning phase may be different from those required during the operational phase.

If the decommissioning process affects any part of the AGL system and impacts the overall safety, it must trigger a return to the relevant phase of the AGL system safety lifecycle All following phases must be carried out according to the procedures outlined in this technical specification.

1 – Operational requirements and design concept

To describe fully the purpose of the AGL system in its intended environment (operational, physical, social, political and legislative) to enable the other lifecycle activities to be satisfactorily performed.

To identify the high-level hazards of the AGL system, and the event sequences leading to the hazards, in all modes of operation and all reasonably foreseeable circumstances.

To develop the initial safety requirements for the AGL system, including the mandatory or statutory requirements that shall apply.

Operational/physical/social/ political/legislative environment.

The operational requirements, physical equipment and the aerodrome environment.

All relevant information necessary to meet the requirements of the clause, including standards, regulations, environmental factors AGL safety plan

AGL safety assessment plan Verification plan

Mandatory safety requirements Verification report [AGL safety case]

To develop the safety requirements for the AGL system.

To allocate specific safety requirements to each component of the AGL system.

The AGL system, the AGL and human factors.

AGL safety plan AGL safety assessment plan AGL safety case

4 – System component design and manufacture

To create an AGL system that conforms to all the applicable safety requirements and will satisfy the intended operational requirements.

AGL system and/or components

AGL system safety requirement validation Mitigation

To develop the safety requirements and procedures for the installation of the AGL system.

To develop the safety requirements and procedures for the commissioning of the AGL system.

To establish safety requirements for the operation and maintenance of the AGL system, it is essential to ensure the safety of both the system and the personnel involved in its use This approach guarantees that safety standards are upheld throughout all operational and maintenance activities related to the AGL system.

The AGL system, its components, the operation and maintenance of the AGL, aerodrome operations, health and safety regulations, and human factors

AGL installation plan AGL commissioning plan

AGL operations and maintenance plan Verification reports

To ensure that the AGL system is installed in a safe manner.

AGL installation plan Verification plan

To ensure that the AGL system is validated and that the applicable AGL system safety requirements are met.

AGL commissioning plan Verification plan

To operate and maintain the AGL system such that the designed level of safety is maintained.

To ensure that the level of safety is maintained during and after modification to the AGL system.

AGL operations and maintenance plan

AGL safety case Verification report

To ensure that the level of safety is maintained during and after the decommissioning process of the AGL system or part thereof.

AGL operations and maintenance plan

AGL safety case AGL decommissioning plan Verification report

IEC 61508-4, Functional safety of electrical/electronic/programmable electronic safety-related systems – Part 4: Definitions and abbreviations

IEC 62144, Electrical installations for lighting and beaconing of aerodromes – Aeronautical ground lighting control and monitoring systems – System requirements 1

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Tiêu đề	IEC TS 62143 2002
Trường học	International Electrotechnical Commission
Chuyên ngành	Electrical Installations
Thể loại	Technical specification
Năm xuất bản	2002
Thành phố	Geneva

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