Document Title: Airworthiness Approval of Satellite Voice Equipment Supporting Air Traffic Service (ATS) Communication
Summary: This advisory circular (AC) provides guidance on airworthiness approval for designers, manufacturers, and installers of satellite voice equipment supporting air traffic service (ATS). In this AC, the Federal Aviation Administration (FAA) recommends one way to gain airworthiness approval for satellite voice equipment. This AC is not mandatory and does not constitute a regulation. This AC describes an acceptable means, but not the only means, to gain airworthiness approval for your satellite voice equipment. However, if you use the means described in this AC, you must follow it in its entirety.
Documents for Download: Draft Document (PDF)
Draft Document Comment Grid (MS Excel)
Reference:
Comments Due: December 8, 2014
How to Comment: Email comments to:
david.w.robinson@faa.gov

Deliver comments by mail or hand to:
Federal Aviation Administration
Aircraft Certification Service
Systems and Equipment Standards Branch, AIR-130
470 L'Enfant Plaza, SW, Ste. 4102
Washington, DC 20024

Fax comments to:
202-267-8589
Document Title: AC 25.954-X Transport Airplane Fuel System Lightning Protection
Summary: This proposed AC provides information and guidance on how to show compliance with the airworthiness regulations for transport category airplanes regarding lightning protection of fuel tanks and systems. These lightning protection requirements apply to normal conditions and possible failures of fuel tank structure and systems that could lead to fuel tank explosions. This AC also provides guidance on how to meet maintenance requirements and how to develop critical design configuration control limitations and instructions for continued airworthiness related to lightning protection features of the airplane fuel system.
Documents for Download: Draft Document (MS Word)
Draft Document Comment Grid (MS Word)
Reference: 14 CFR 25.954
Comments Due: March 18, 2015
How to Comment: Email comments to:
theresa.j.white@faa.gov

Deliver comments by mail or hand to:
Federal Aviation Administration
Transport Airplane Directorate
Transport Standards Staff, ANM-113
1601 Lind Ave. SW
Renton, WA 98057

Fax comments to:
425-227-1232
Document Title: AC 25.981-1X Fuel Tank Ignition Source Prevention Guidelines
Summary: This revised AC provides guidance for demonstrating compliance with the certification requirements for prevention of ignition sources, except lightning, which is addressed in AC 25.954-X, within the fuel tanks of transport category airplanes. This AC also identifies the need for prevention of failure conditions by which ignition will be created from sources other than lightning and describes a method using circuit protective devices such as arc fault circuit breakers (AFCB) or ground fault interrupter (GFI) to provide fail-safe features that have been approved as demonstrating compliance with § 25.981. This guidance is applicable to transport category airplanes for which a new, amended, or supplemental type certificate is requested.
Documents for Download: Draft Document (MS Word)
Draft Document Comment Grid (MS Word)
Reference: 14 CFR 25.981
Comments Due: March 18, 2015
How to Comment: Email comments to:
theresa.j.white@faa.gov

Deliver comments by mail or hand to:
Federal Aviation Administration
Transport Airplane Directorate
Transport Standards Staff, ANM-113
1601 Lind Ave. SW
Renton, WA 98057

Fax comments to:
425-227-1232