2021-19926

Document Headings Document headings vary by document type but may contain the following: • the agency or agencies that issued and signed a document • the number of the CFR title and the number of each part the document amends, proposes to amend, or is directly related to • the agency docket number / agency internal file number • the RIN which identifies each regulatory action listed in the Unified Agenda of Federal Regulatory and Deregulatory Actions See the Document Drafting Handbook for more details. Department of Transportation Federal Aviation Administration • 14 CFR Part 33 • [Docket No. FAA-2020-0894; Special Conditions No. 33-022-SC] AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Final special conditions. SUMMARY: These special conditions are issued for the magniX USA, Inc., (magniX), magni350 and magni650 model engines, which operate using electrical technology installed on the aircraft for use as an aircraft engine. These engines have a novel or unusual design feature when compared to the state of technology envisioned in the airworthiness standards applicable to aircraft engines. This design feature is an electric motor, controller, and high-voltage systems as the primary source of propulsion for an aircraft. The applicable airworthiness regulations do not contain adequate or appropriate safety standards for this design feature. These special conditions contain the additional safety standards that the Administrator considers necessary to establish a level of safety equivalent to that established by the existing airworthiness standards. DATES: Effective October 27, 2021. FOR FURTHER INFORMATION CONTACT: Mark Bouyer, AIR-624, Propulsion and Energy, Technical Innovation Policy Branch, Aircraft Certification Service, 1200 District Avenue, Burlington, Massachusetts 01803; telephone (781) 238-7755; mark.bouyer@faa.gov. SUPPLEMENTARY INFORMATION: Background On April 18, 2019,[1] magniX applied for a type certificate for its magni350 and magni650 model electric engines.[2] The FAA has not previously type certificated an engine that primarily uses electrical technology for propulsion of the aircraft. Electric propulsion technology is substantially different from the technology used in previously certificated aircraft engines that operate using aviation fuel; therefore, these engines introduce new safety concerns that need to be addressed in the certification basis. As noted in the Notice of Proposed Special Conditions, the FAA used technical criteria from ASTM F3338-18, Standard Specification for Design of Electric Propulsion Units for General Aviation Aircraft,[3] along with engine information from magniX and other information, to develop these special conditions. These special conditions establish a level of safety that is equivalent to the level of safety required by title 14, Code of Federal Regulations (14 CFR) part 33. Type Certification Basis Under the provisions of 14 CFR 21.17(a)(1), generally, magniX must show that magni350 and magni650 model engines meet the applicable provisions of 14 CFR part 33 in effect on the date of application for a type certificate. If the Administrator finds that the applicable airworthiness regulations ( e.g.,14 CFR part 33) do not contain adequate or appropriate safety standards for the magni350 and magni650 model engines because of a novel or unusual design feature, special conditions may be prescribed under the provisions of § 21.16. Special conditions are initially applicable to the model for which they are…

Fonte: Federal Register (federalregister.gov). Texto original em inglês. Conteúdo sanitizado por segurança.