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

 
Document Title: AC 20-136C, Aircraft Electrical and Electronic System Lightning Protection
Summary: This advisory circular (AC) provides you, the applicant, with information and guidance on how you can protect aircraft electrical and electronic systems from the effects of lightning. This AC describes a means, but not the only means, for you to demonstrate compliance with Title 14, Code of Federal Regulations (14 CFR) 23.1306 (amendment 23-61), 23.2515, 25.1316, 27.1316, and 29.1316, Electrical and electronic system lightning protection, as they pertain to the type or supplemental type certification of your aircraft.
Reference: 14 CFR 23.1306 (amendment 23-61), 23.2515, 25.1316, 27.1316, and 29.1316
Documents for Download:  Draft Document
Comment Matrix
Comments Due: February 5, 2025
How to Comment: Email comments to joshua.ctr.warren@faa.gov
 
Document Title: AC 33.15-1A, Manufacturing Process of Premium Quality Titanium Alloy Rotating Engine Components
Summary: This advisory circular (AC) provides guidance and information for compliance with the provisions under title 14, Code of Federal Regulations (14 CFR), part 33 on the materials suitability and durability requirements of § 33.15, as applicable to the manufacture of titanium alloy high energy rotating parts of aircraft engines.
Reference: 14 CFR part 33.
Documents for Download:  Draft Document
Comment Matrix
Comments Due: February 14, 2025
How to Comment: Email comments to matthew.j.miller01@faa.gov and timolean.mouzakis@faa.gov
 
Document Title: AC 25.1581-1A, Airplane Flight Manual
Summary: This advisory circular (AC) identifies the information that must be provided in a Federal Aviation Administration (FAA) approved Airplane Flight Manual (AFM) for a transport category airplane under the airworthiness regulations. This AC also provides guidance as to the form and content of the approved portion of an AFM.

This revision addresses FAA Safety Recommendation 19.167 by providing guidance regarding the information considered necessary for safely operating the airplane.
Reference: 14 CFR 25.1581, 14 CFR 25.1583, 14 CFR 25.1585, and 14 CFR 25.1587
Documents for Download:  Draft Document
Comment Matrix
Comments Due: March 5, 2025
How to Comment: Email comments to guy.h.matherly@faa.gov

Related Information

Last updated: Wednesday, January 15, 2025