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September 2005 edition

Aviation standards committee takes first steps to develop electrical wiring system benchmark

By Barry Ballenger

Standards development organisation, the ASTM International Committee F39, has approved its first standard, F2490, Guide for Aircraft Electrical Load and Power Source Capacity Analysis. The new guide provides details on how to prepare an electrical load analysis to meet Federal Aviation Administration requirements.

The FAA’s Small Airplane Directorate took part in the Ageing Transport Systems Rulemaking Advisory Committee (ATSRAC) working group 10. Its findings identified the need for acceptable standards for the certification and continued airworthiness of electrical systems installed in civil aircraft.

The fleet of general aviation aircraft, which represents 90% of the civil aviation fleet, is a diverse mixture and has an average age of 35 years. As these aircraft continue to age, the development of relevant standards for adequately maintaining these aircraft will become increasingly important.

Public Law 104-113 [in the US] states that federal agencies will use the Voluntary Consensus Standards method instead of developing government unique standards. These standards utilise industry expertise to develop an agreed set of standards that provide consistent technical data including processes, procedures, rules and conditions for electrical wiring systems.

Industry and government use published consensus standards to insure safety, reliability and consistency in many areas of manufacturing and operations. By definition, a “voluntary consensus standards body” has the following c....

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