Identification and Registration Marking
This advisory circular (AC) provides information about Title 14, Code of Federal Regulations (14 CFR), part 45, Identification and Registration Marking. This AC is not mandatory and does not constitute a regulation. This AC describes an acceptable means, but not the only means, to comply with the requirements for identifying aircraft and aircraft engines with identification plates, identification marking requirements for propellers, and marking aircraft with nationality and registration marks. However, if you use the means described in the AC, you must follow it in all important respects.
A list of other related sections of 14 CFR and related publications, and definitions pertinent to this AC are located in the appendixes to this AC.
Notices to Airmen (NOTAMs) for Airport Operators
This AC provides guidance on using the Notice to Airmen (NOTAM) system for reporting airport facilities changes or outages and for airport condition reporting. It explains procedures used to describe, format, and disseminate information on unanticipated or temporary changes to components of, or hazards in, the National Airspace System (NAS).
Specification for Runway and Taxiway Signs
This AC contains the FAA specifications for unlighted and lighted signs to be used on taxiways and runways.
Pilot Guide: Flight In Icing Conditions
This advisory circular (AC) contains updated and additional information for the pilots of airplanes under Title 14 of the Code of Federal Regulations (14 CFR) parts 91, 121, 125, and 135. The purpose of this AC is to provide pilots with a convenient reference guide on the principal factors related to flight in icing conditions and the location of additional information in related publications. As a result of these updates and consolidating of information, AC 91-74A, Pilot Guide: Flight in Icing Conditions, dated December 31, 2007, and AC 91-51A, Effect of Icing on Aircraft Control and Airplane Deice and Anti-Ice Systems, dated July 19, 1996, are cancelled. This AC does not authorize deviations from established company procedures or regulatory requirements.