Document Title:	AIRWORTHINESS APPROVAL OF ATTITUDE HEADING REFERENCE SYSTEM (AHRS) EQUIPMENT
Summary:	This advisory circular (AC) supplements existing airworthiness approval guidance for attitude heading reference system (AHRS) articles approved under technical standard order (TSO) C201, Attitude Heading Reference System, or later revisions. TSO-C201 includes performance standards for non-gimbaled attitude, heading, turn, slip and skid systems.
Documents for Download:	Draft Document (MS Word) Draft Document Comment Grid (MS Word)
Reference:
Comments Due:	February 7, 2014
How to Comment:	Email comments to: sheila.mariano@faa.gov Deliver comments by mail or hand to: Sheila Mariano Federal Aviation Administration Northwest Mountain Regional Office 1601 Lind Avenue, SW Renton, WA 98057 Fax comments to: 202-385-4651

Document Title:	AC 21-XX, Experimental Airworthiness Certification of Certain Former Military Aircraft
Summary:	This advisory circular (AC) provides information and guidance concerning special airworthiness certification in the experimental category of certain former military aircraft under Title 14 of the Code of Federal Regulations (14 CFR) part 21, Certification Procedures for Products and Parts, § 21.191.
Documents for Download:	Draft Document (PDF) Draft Document Comment Grid (MS Word)
Reference:	14 CFR 21.191
Comments Due:	March 30, 2014
How to Comment:	Email comments to: richard.posey@faa.gov Deliver comments by mail or hand to: FAA, AIR-200 950 L'Enfant Plaza, SW 5th Floor - Suite#500 Washington, DC 20024 Fax comments to: 202-385-6346