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EUROCAE ED 93
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EUROCAE ED 93 1998 Edition, November 1998 MINIMUM AVIATION SYSTEM PERFORMANCE SPECIFICATION FOR CNS/ATM MESSAGE RECORDING SYSTEMS
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Description / Abstract:
PURPOSE AND SCOPE
The fundamental airborne flight recorder regulatory framework developed in the late 1950's and early 1960's addressed voice based communications to and from aircraft, consistent with the technology of the time. The Communications, Navigation, Surveillance (CNS) and Air Traffic Management (ATM) concepts, endorsed by ICAO, rely extensively on new technology which replaces many of these communications with digital messages. CNS/ATM operations have already become and will continue to be more dependent upon these digital communications. The accident investigation community believes that the fundamental recording requirements have not substantially changed, but that the regulatory framework needs to be revisited in light of new technology and concepts introduced with CNS/ATM. In particular, the replacement of traditional voice messages with digital messaging technology creates a need to consider new systems to ensure that the information necessary for incident and accident investigation continues to be recorded on-board the aircraft.
The ICAO FLIREC PANEL which convened in 1993, recommended that;
"All aeroplanes equipped to utilise digital ATS communications and required to carry a cockpit voice recorder shall record the digital communications messages on the cockpit voice recorder."
This document contains minimum aviation system performance specifications for Communication, Navigation, Surveillance, Air Traffic Management (CNS/ATM) Message Recording System. They specify characteristics that should be useful as guidance material to regulatory authorities, designers, installers, manufacturers, service providers and users of systems intended for operational. Where systems are global in nature, the system may have international applications which are taken into consideration.
Compliance with these specifications is recommended as one means of assuring that the system and each subsystem will perform its intended function(s) satisfactorily under conditions normally encountered in routine aeronautical operations for the environments intended. The MASPS may be implemented by one or more regulatory documents and/or advisory documents (for example certifications, authorisations, approvals, commissioning, advisory circulars, notices) and may be implemented in part or in total. Any regulatory application of this document is the sole responsibility of appropriate governmental authorities.
While this MASPS does not specify where the information is to be recorded on board the aircraft, there may be advantages to adapting Cockpit Voice Recorders to handle many of these requirements. However, for some information, such as navigation parameters, it may be better to use the Flight Data Recorder. This MASPS does not preclude the development of new architecture recorders.
Chapter 1 of this document describes the CNS/ATM Message Recording System and provides information helpful to understand the rationale for the system characteristics and requirements. This chapter describes typical applications, operational goals and establishes the basis for the specifications developed in Chapters 2 through 4 of the document. Definitions and assumptions essential to a proper understanding of this document are also provided in this chapter.
Chapter 2 describes the overall CNS/ATM system architecture.
Chapter 3 contains the minimum performance specifications for each subsystem/function that is a required element of minimum system performance in Chapter 2. These standards specify the required performance under the standard environmental conditions described.
Chapter 4 describes the minimum system test procedures to verify system performance compliance (for example end-to-end performance verification) and that subsystem performance meets the minimum performance requirements in Chapters 2 and 3.
Chapter 5 links the contents of the previous four chapters to future equipment performance specifications. These new documents will define airborne and ground recorder requirements for CNS/ATM technology.
The word "subsystem" as used in this document includes all components that make up a major independent, necessary and essential functional part of the system so that the system can properly perform its intended function(s). The guidelines contained in the latest version of EUROCAE ED-12/RTCA DO-178 should be considered, even for non-airborne applications, for systems and subsystems containing software.
The fundamental airborne flight recorder regulatory framework developed in the late 1950's and early 1960's addressed voice based communications to and from aircraft, consistent with the technology of the time. The Communications, Navigation, Surveillance (CNS) and Air Traffic Management (ATM) concepts, endorsed by ICAO, rely extensively on new technology which replaces many of these communications with digital messages. CNS/ATM operations have already become and will continue to be more dependent upon these digital communications. The accident investigation community believes that the fundamental recording requirements have not substantially changed, but that the regulatory framework needs to be revisited in light of new technology and concepts introduced with CNS/ATM. In particular, the replacement of traditional voice messages with digital messaging technology creates a need to consider new systems to ensure that the information necessary for incident and accident investigation continues to be recorded on-board the aircraft.
The ICAO FLIREC PANEL which convened in 1993, recommended that;
"All aeroplanes equipped to utilise digital ATS communications and required to carry a cockpit voice recorder shall record the digital communications messages on the cockpit voice recorder."
This document contains minimum aviation system performance specifications for Communication, Navigation, Surveillance, Air Traffic Management (CNS/ATM) Message Recording System. They specify characteristics that should be useful as guidance material to regulatory authorities, designers, installers, manufacturers, service providers and users of systems intended for operational. Where systems are global in nature, the system may have international applications which are taken into consideration.
Compliance with these specifications is recommended as one means of assuring that the system and each subsystem will perform its intended function(s) satisfactorily under conditions normally encountered in routine aeronautical operations for the environments intended. The MASPS may be implemented by one or more regulatory documents and/or advisory documents (for example certifications, authorisations, approvals, commissioning, advisory circulars, notices) and may be implemented in part or in total. Any regulatory application of this document is the sole responsibility of appropriate governmental authorities.
While this MASPS does not specify where the information is to be recorded on board the aircraft, there may be advantages to adapting Cockpit Voice Recorders to handle many of these requirements. However, for some information, such as navigation parameters, it may be better to use the Flight Data Recorder. This MASPS does not preclude the development of new architecture recorders.
Chapter 1 of this document describes the CNS/ATM Message Recording System and provides information helpful to understand the rationale for the system characteristics and requirements. This chapter describes typical applications, operational goals and establishes the basis for the specifications developed in Chapters 2 through 4 of the document. Definitions and assumptions essential to a proper understanding of this document are also provided in this chapter.
Chapter 2 describes the overall CNS/ATM system architecture.
Chapter 3 contains the minimum performance specifications for each subsystem/function that is a required element of minimum system performance in Chapter 2. These standards specify the required performance under the standard environmental conditions described.
Chapter 4 describes the minimum system test procedures to verify system performance compliance (for example end-to-end performance verification) and that subsystem performance meets the minimum performance requirements in Chapters 2 and 3.
Chapter 5 links the contents of the previous four chapters to future equipment performance specifications. These new documents will define airborne and ground recorder requirements for CNS/ATM technology.
The word "subsystem" as used in this document includes all components that make up a major independent, necessary and essential functional part of the system so that the system can properly perform its intended function(s). The guidelines contained in the latest version of EUROCAE ED-12/RTCA DO-178 should be considered, even for non-airborne applications, for systems and subsystems containing software.