Aircraft Certification Service (AIR) Draft Advisory Circulars (ACs) Open for Comment
Document Title: | AC 21-12D, Application for U.S. Airworthiness Certificate |
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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 |
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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 |
Related Information
- Final Aircraft Certification advisory circulars, other policy documents, and technical standard orders (TSOs) are available on FAA's Dynamic Regulatory System (DRS)
- Advisory Circulars (ACs)
- FAA Regulations
- Orders & Notices
- Policy & Guidance
- To comment on rulemaking documents, please visit the DOT Docket Management System.
Last updated: Tuesday, September 16, 2025