ASTM F3231/F3231M-23 PDF
Standard Specification for Electrical Systems for Aircraft with Combustion Engine Electrical Power Generation
Standard Specification for Electrical Systems for Aircraft with Combustion Engine Electrical Power Generation
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 15
- Дата публикации:
- 1 января 2023 г.
- Издание:
- F3231/F3231M
- ICS:
- 49.020
ABSTRACT This specification applies to the electrical systems aspects of airworthiness and design for ”small” aircraft. It establishes the Aircraft Type Code (ATC) compliance matrix based on airworthiness level, number of engines, type of engine(s), stall speed, cruise speed, meteorological conditions, altitude, and maneuvers. An ATC is defined by taking into account both the technical considerations regarding the design of the aircraft and the airworthiness level established based upon risk-based criteria. The requirements established by this specification cover power source capacity and distribution, electrical systems and equipment, storage battery design and installation, circuit protective devices, master switch arrangement, switches, electrical cables and equipment, electrical system fire protection, and electronic equipment. SCOPE 1.1 This specification covers electrical systems, electrical equipment, and electrical power distribution aspects of airworthiness and design for aeroplanes with combustion engine generation of electrical power. The material was developed through open consensus of international experts in general aviation. This information was created by focusing on Normal Category Aeroplanes. The content may be more broadly applicable; it is the responsibility of the applicant to substantiate broader applicability as a specific means of compliance. 1.2 An applicant intending to propose this information as Means of Compliance for a design approval shall seek guidance from their respective oversight authority (for example, published guidance from applicable civil aviation authorities (CAAs)) concerning the acceptable use and application thereof. For information on which oversight authorities have accepted this specification (in whole or in part) as an acceptable Means of Compliance to their regulatory requirements (hereinafter “the Rules”), refer to ASTM Committee F44 web page (www.astm.org/COMMITTEE/F44.htm). Annex A1 maps the Means of Compliance described in this specification to EASA CS-23, amendment 5, or later, and FAA 14 CFR Part 23, amendment 64, or later. 1.3 Units—This standard may present information in either SI units, English Engineering units, or both; the values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Abstract
Overview
ASTM F3231/F3231M-23: Standard Specification for Electrical Systems for Aircraft with Combustion Engine Electrical Power Generation sets out requirements for the design, installation, and certification of electrical systems in small aircraft powered by combustion engines. Developed through international consensus, this ASTM standard targets primarily Normal Category aeroplanes, but its principles may be referenced for broader applications where substantiated. The specification defines compliance criteria to ensure airworthiness, safety, and functionality of aircraft electrical power systems, encompassing power source generation, system architecture, protective devices, and fire protection.
Key Topics
- Airworthiness Compliance: Establishes a matrix (Aircraft Type Code, ATC) based on aircraft type, risk-based criteria, operational conditions, and regulatory requirements.
- Electrical Power Generation and Distribution: Outlines standards for specifying, sizing, and distributing power from combustion engine generators/alternators to essential and non-essential loads.
- System Redundancy and Failure Management: Details capacity and fail-safe criteria to meet critical operational needs after generator or power system failures.
- Circuit Protection: Requires installation and configuration of protective devices, such as fuses and circuit breakers, to prevent overloads and enhance safety.
- Storage Battery Requirements: Specifies criteria for battery design, installation, safety, and energy reserve for essential loads during loss of primary power.
- Master Switch Arrangement: Mandates master switch arrangements for isolating power sources, alongside single-action operation for urgent disconnections.
- Cable and Equipment Installation: Addresses selection, identification, routing, and protection of electrical wiring and equipment with attention to mechanical, fire, and hazard risk.
- Fire Protection and Insulation: Sets fire resistance and self-extinguishing requirements on cables and components per referenced FAA/EASA standards.
- Electronic Equipment Integration: Ensures electromagnetic compatibility of installed avionics and radio systems, preventing operational interference.
Applications
ASTM F3231/F3231M-23 serves several practical purposes in general aviation and related aircraft industries:
- Aircraft Design and Certification: Provides clear requirements for airframe engineers to achieve compliance for aircraft with combustion engine electrical systems under regulations such as FAA 14 CFR Part 23 and EASA CS-23.
- Means of Compliance: May be used as supporting evidence when seeking regulatory approval; applicants must engage oversight authorities (e.g., CAA, FAA, EASA) for guidance and acceptance status.
- Inspection and Maintenance: Offers criteria for maintenance personnel to assess system conformity, circuit protection, and battery capacity, supporting ongoing airworthiness.
- System Upgrades and Retrofits: Guides modifications or upgrades to older aircraft systems to meet modern safety and reliability expectations.
- Industry Best Practices: Serves as a benchmark for manufacturers, repair stations, and equipment suppliers to ensure equipment meets expected performance and reliability standards.
Related Standards
To address the broad scope of aircraft electrical systems, ASTM F3231/F3231M-23 references and correlates with several other industry standards, including:
- ASTM F2490: Guide for Aircraft Electrical Load and Power Source Capacity Analysis
- ASTM F2639: Practice for Design, Alteration, and Certification of Aircraft Electrical Wiring Systems
- ASTM F3061/F3061M: Specification for Systems and Equipment in Aircraft
- ASTM F3066/F3066M: Specification for Aircraft Powerplant Installation Hazard Mitigation
- ASTM F3117/F3117M: Specification for Crew Interface in Aircraft
- ASTM F3235: Specification for Aircraft Storage Batteries
- ASTM F3316/F3316M: Specification for Electrical Systems for Aircraft with Electric or Hybrid-Electric Propulsion
- FAA 14 CFR Part 23: Airworthiness Standards - Normal Category Airplanes
- EASA CS-23: Certification Specification for Normal, Utility, Aerobatic, and Commuter Aeroplanes
For up-to-date compliance mapping and accepted practices, consult the ASTM Committee F44 on General Aviation Aircraft (www.astm.org/COMMITTEE/F44.htm).
Keywords: aircraft electrical systems, combustion engine, airworthiness, aircraft power generation, circuit protection, storage battery, aviation standard, FAA Part 23, EASA CS-23.
Технические детали
- Технический комитет
- F44 - General Aviation Aircraft
- SKU
- ASTM F3231/F3231M-23
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