Aircraft Certification Service (AIR) Draft Advisory Circulars (ACs) Open for Comment

 
Document Title: AC 21-12D, Application for U.S. Airworthiness Certificate
Summary: This advisory circular (AC) provides guidance and information needed to prepare and submit an application for a U.S. airworthiness certificate by either using the Federal Aviation Administration’s (FAA) online application tool for Airworthiness Certification, hereafter referred to as AWC, or FAA Form 8130-6, Application for U.S. Airworthiness Certificate, paper form.
Reference: 14 CFR 21.183, 14 CFR 21.184, 14 CFR 21.25, 14 CFR 21.185, 14 CFR 21.187, 14 CFR 21.190, 14 CFR 21.191, 14 CFR 21.197
Documents for Download:  Draft Document
Comment Matrix
Comments Due: October 9, 2025
How to Comment: Email comments to Michael.Meads@faa.gov
 
Document Title: AC 20-184A, Guidance on Testing and Installation of Rechargeable Lithium Battery and Battery Systems on Aircraft
Summary: This advisory circular (AC) provides manufacturers, installers, and operators with an acceptable means, but not the only means, of compliance with title 14, Code of Federal Regulations (14 CFR), sections 23.2525, 25.1353, 27.1353, 29.1353 and additional commonly-issued requirements related to the design, installation, operation, and maintenance of rechargeable lithium batteries and battery systems on aircraft. Additionally, the installation of the battery and/or battery system will require regulatory compliance with the regulations referenced in Table 2-1 of this AC.
Reference: 14 CFR parts 23, 25, 27, and 29
Documents for Download:  Draft Document
Comment Matrix
Comments Due: October 14, 2025
How to Comment: Email comments to 9-AVS-TechWriters@faa.gov

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Last updated: Tuesday, September 16, 2025