Aircraft Certification Service (AIR) Draft Advisory Circulars (ACs) Open for Comment
| Document Title: |
AC 25.853-1A: Flammability Requirements for Transport Category Airplanes |
|---|---|
| Summary: | This advisory circular (AC) provides guidance for an acceptable means of showing compliance with the requirements of title 14, Code of Federal Regulations (14 CFR) §§ 25.853, 25.855, and 25.856. These sections require materials, parts, and components used in transport category airplanes to meet performance standards specific to the type of fire threat to which they will be exposed. (This is a revised proposed AC related to Interior Parts and Components Fire Protection for Transport Category Airplanes, supplemental notice of proposed rulemaking, docket number FAA-2019-0491.) |
| Reference: | Title 14 of the Code of Federal Regulations (14 CFR), part 25 |
| Documents for Download: | Draft Document Comment Matrix |
| Comments Due: | October 2, 2023 |
| How to Comment: |
Email comments to: lesley.m.haenny@faa.gov |
| Document Title: |
AC 20-66B Change 1, Propeller Vibration and Fatigue |
|---|---|
| Summary: | This change updates methods of compliance in response to a safety recommendation involving an incident on a turboprop-powered airplane. More generally, this advisory circular (AC) provides guidance and describes acceptable methods, but not the only methods, for demonstrating compliance with §§ 23.907 (amendment 63 and earlier), 23.2400 (amendment 64), and 25.907 of title 14 of the Code of Federal Regulations (14 CFR) for the evaluation of vibratory stresses on propellers installed on airplanes. This evaluation method uses fatigue and structural data obtained in accordance with 14 CFR part 35. |
| Reference: | Title 14 of the Code of Federal Regulations (14 CFR), parts 23, 25, 35 |
| Documents for Download: | Draft Document Comment Matrix |
| Comments Due: | October 9, 2023 |
| How to Comment: |
Email comments to: Tracy.r.szczepaniak@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: Wednesday, September 27, 2023